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What is a computer?
A programmable machine, the two principal characteristics of a computer are:
1. It responds to a specific set ofinstructions in a well-defined manner.
2.It can execute a prerecorded list of instructions (a program).
Modern computers are electronic and digital. The actual machinery -- wires, transistors,
and circuits -- is called hardware; the instructions and data are called software.
All general-purpose computers require the following hardware components:
Memory : Enables a computer to store, at least temporarily, data and programs.
Mass storage device : Allows a computer to permanently retain large amounts of data.
Common mass storage devices include disk drives and tape drives. Input device : Usually a keyboard and mouse, the input device is the conduit through
which data and instructions enter a computer.
Output device : A display screen,printer, or other device that lets you see what the
computer has accomplished.
Central processing unit (CPU): The heart of the computer, this is the component that
actually executes instructions.
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Therefore this paragraph has been created with a listing of each of the first computers
starting with the first programmable computer leading up to the computers of today.
Keep in mind that early inventions such as the abacus, calculators, tablet machines,
difference machine, etc. are not accounted for in this document.
First programmable computer
The Z1 originally created by Germany's Konrad Zuse in his parents living room in 1936
to 1938 is considered to be the first electrical binary programmable computer.
The first digital computer
Short for Atanasoff-Berry Computer, the ABC started being developed by Professor
John Vincent Atanasoff and graduate student Cliff Berry in 1937 and continued to be
developed until 1942 at the Iowa State College (now Iowa State University). On October
19, 1973, US Federal Judge Earl R. Larson signed his decision that the ENIAC patent by
Eckert and Mauchly was invalid and named Atanasoff the inventor of the electronic
digital computer.
The ENIAC was invented by J. Presper Eckert and John
Mauchly at the University of Pennsylvania and began
construction in 1943 and was not completed until 1946.
It occupied about 1,800 square feet and used about
18,000 vacuum tubes, weighing almost 50 tons.
Although the Judge ruled that the ABC computer was
the first digital computer many still consider the ENIAC to be the first digital computer.
See the ENIAC definition for additional information about this computer.
Because of the Judge ruling and because the case was never appealed like most we
consider the ABC to be the first digital computer. However, because the ABC was never
fully functional we consider the first functional digital computer to be the ENIAC.
The first computer with RAM
MIT introduces the Whirlwind machine March 8, 1955, a revolutionary computer that
was the first digital computer with magnetic core RAM and real-time graphics.
The first transistor computer
The TX-O (Transistorized Experimental computer) and first transistorized computer is
demonstrated at the Massachusetts Institute of Technology in 1956.
The first stored program computer
The early British computer known as the EDSAC is considered to be the first stored
program electronic computer. The computer performed its first calculation on May 6,1949 and was the computer that ran the first graphical computer game.
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The first minicomputer
In 1960 Digital Equipment Corporation released its first of many PDP computers the
PDP-1.
The first personal computer
In 1975 Ed Roberts coined the term personal computer when he introduced the Altair
8800. Although the first personal computer is considered to be the Kenback-1, which
was first introduced for $750 in 1971. The computer relied on a series of switches for
inputting data and output data by turning on and off a series of lights.
The Micral is considered the be the first commercial non-assembly computer. The
computer used the Intel 8008 processor and sold for $1,750 in 1973.
The first workstation
Although never sold the first workstation is considered to be the Xerox Alto, introduced
in 1974. The computer was revolutionary for its time and included a fully functional
computer, display, and mouse. The computer operated like many computers today
utilizing windows, menus and icons as an interface to its operating system.
The first laptop or portable computer
The first portable computer or laptop is considered to be the Osborne I, a portable
computer developed by Adam Osborne that weighed 24 pounds, a 5-inch display, 64 KB
of memory, two 5 1/4" floppy drives, and a modem.
IBM PCD later released the IBM portable in 1984, it's first portable computer that
weighed in at 30 pounds. IBM PCD later announced in 1986 it's first laptop computer,
the PC Convertible, weighing 12 pounds. And in 1994 introduces the IBM ThinkPad
775CD, the first notebook with an integrated CD-ROM.
The first PC (IBM compatible) computer
In 1953 IBM shipped its first electric computer, the 701. Later IBM introduced its first
personal computer called the "IBM PC" in 1981. The computer was code named and still
sometimes referred to as the "Acorn" and had a 8088 processor, 16 KB of memory,
which was expandable to 256 and utilizing MS-DOS.
The first PC clone
The first PC clone was developed by Compaq, the "Compaq Portable" was release in
March 1983 and was 100% compatible with IBM computers and software that ran on
IBM computers.
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The first Apple computer
Steve Wozniakdesigned the first Apple known as the Apple I computer in 1976.
The first computer company
The first computer company was the Electronic Controls Company and was founded in
1949 by J. Presper Eckert and John Mauchly, the same individuals who helped create the
ENIAC computer. The company was later renamed to EMCC or Eckert-Mauchly
Computer Corporation and released a series of mainframe computers under the UNIVAC
name.
The first multimedia computer
In 1992 Tandy Radio Shack becomes one of the first companies to release a computer
based on the MPC standard with its introduction of the M2500 XL/2 and M4020 SX
computers.Other major computer company firsts
Below is a listing of some of the major computers companies first computers.
Compaq - March 1983 Compaq released its first computer and the first 100% IBM
compatible computer the "Compaq Portable."
Dell - In 1985 Dell introduced its first computer, the "Turbo PC."
Hewlett Packard - In 1966 Hewlett Packard released its first general computer, the "HP-
2115."NEC - In 1958 NEC builds its first computer the "NEAC 1101."
Toshiba - In 1954 Toshiba introduces its first computer, the "TAC" digital computer.
Another way of the history of computer
1939
David Packard and Bill
Hewlett in their Palo
Alto,California Garage
Hewlett-Packard is Founded. David Packard and Bill Hewlett
found Hewlett-Packard in a Palo Alto, California garage.Their first product was the HP 200A Audio Oscillator, which
rapidly becomes a popular piece of test equipment for
engineers. Walt Disney Pictures ordered eight of the 200B
model to use as sound effects generators for the 1940 movie
Fantasia.
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1946
ENIAC
In February, the public got its first glimpse of the ENIAC, a
machine built by John Mauchly and J. Presper Eckert thatimproved by 1,000 times on the speed of its contemporaries.
UNIVAC I
The UNIVAC I delivered to the U.S. Census Bureau was
the first commercial computer to attract widespread public
attention. Although manufactured by Remington Rand, the
machine often was mistakenly referred to as the "IBM
UNIVAC." Remington Rand eventually sold 46 machines at more than $1 million
each.F.O.B. factory $750,000 plus $185,000 for a high speed printer.
Kenbak-1
The Kenbak-1, the first personal computer, advertised
for $750 in Scientific American. Designed by John V.
Blankenbaker using standard medium-scale and
small-scale integrated circuits, the Kenbak-1 relied on
switches for input and lights for output from its 256-
byte memory. In 1973, after selling only 40
machines, Kenbak Corp. closed its doors.
1979
Advertisment for Atari 400 and
Atari introduces the Model 400 and 800 Computer.
Shortly after delivery of the Atari VCS game console,
Atari designed two microcomputers with game
capabilities: the Model 400 and Model 800. The two
machines were built with the idea that the 400 would
serve primarily as a game console while the 800
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800 computers
would be more of a home computer. Both sold well,
though they had technical and marketing problems,
and faced strong competition from the Apple II,
Commodore PET, and TRS-80 computers.
1981
IBM introduced its PC, igniting a fast growth of the personal computer market. The first PC
ran on a 4.77 MHz Intel 8088 microprocessor and used Microsofts MS-DOS operating
system.
Early Publicity still for the
Commodore 64
Commodore introduces the Commodore 64. The C64,
as it was better known, sold for $595, came with
64KB of RAM and featured impressive graphics.
Thousands of software titles were released over the
lifespan of the C64. By the time the C64 was
discontinued in 1993, it had sold more than 22 millionunits and is recognized by the 2006 Guinness Book of
World Records as the greatest selling single computer
model of all time.
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Computers can be generally classified by size and power as follows, though there is
considerable overlap
Total Computer system
Hardware Software Live ware Firmware
Input Devices Operators Bootstrap pro.
Output Devices Programmers
CPU
Backing Storage
System Software Application Software
Ope. Sys.
Ant.Vir.
Languages Packages
Pascal Word Processing
VB Spreadsheets
JAVA Database
1.0 Hardware
To understand the basic components of computer hardware, it is very appropriate
to consider a normal clerical system as an analogy. The table compares the computer
system hardware with a manual clerical system. Hardware can be classified in to main
categories which can following,
Input Device
Output Devices
CPU
Backing Storage
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Input Devices
There are wide Varity of input devices to input data, text, graphics, images and
sounds. As a result the use of computer has extended to many areas in organizations.
Input unites are used to feed data and instructions to the computer system. And provide
the interface between the outside world and the computer system for this purpose. There
are most common examples.
Keyboard Mouse Scanner Dig. Camera
Latest Input devices
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Output Devices
To be effective, the computers most produce the information in the best possible
from to a given situation. To achieve this goal a wide variety of output devices had been
developed in the past. Here are some output devices.
Monitor Printer
Speaker
I/O System
Latest Output devices
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Computer Storage.
Secondary Storage Alternatively referred to as external memory and auxiliary storage, secondary
storage is a storage medium that holds information until it is deleted or
overwritten regardless if the computer has power. For example, afloppy disk
driveandhard disk driveare both good examples of secondary storage devices.
As can be seen by the below picture there are three different storage on a
computer, although primary storage is accessed much faster than secondary
storage because of the price and size limitations secondary storage is used with
today's computers to store all your programs and your personal data.
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Finally, although off-line storage could be considered secondary storage, we've
separated these into their own category because this media can be easily removed
from the computer and stored elsewhere.
Internal Storage
There few types of internal storage. Primary storage, Main storage, Immediate
access storage, RAM And ROM.
RAM
Pronounced ram, acronym for random access memory, a type of computer
memory that can be accessed randomly; that is, any byte of memory can be accessed
without touching the preceding bytes. RAM is the most common type of memory found
in computers and other devices, such as printers.
There are two different types of RAM: DRAM (Dynamic Random Access Memory) and
SRAM (Static Random Access Memory). The two types differ in the technology they
use to hold data, with DRAM being the more common type. In terms of speed, SRAM is
faster. DRAM needs to be refreshed thousands of times per second while SRAM does
not need to be refreshed, which is what makes
it faster than DRAM. DRAM supports access
times of about 60 nanoseconds, SRAM can
give access times as low as 10 nanoseconds.
Despite SRAM being faster, it's not as
commonly used as DRAM because it's so
much more expensive. Both types of RAM
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are volatile, meaning that they lose their contents when the power is turned off.
In common usage, the term RAM is synonymous with main memory, the memory
available to programs. For example, a computer with 8MB RAM has approximately 8
million bytes of memory that programs can use. In contrast, ROM (read-only memory)
refers to special memory used to store programs that boot the computer and perform
diagnostics. Most personal computers have a small amount of ROM (a few thousand
bytes). In fact, both types of memory (ROM and RAM) allow random access. To be
precise, therefore, RAM should be referred to as read/write RAM and ROM as read-only
RAM.
Latest RAM s.
The XDR2 memory architecture is the world's fastest memory system solution capableof providing twice the peak bandwidth per device when compared to a GDDR5-basedsystem. Further, the XDR2 memory architecture delivers this performance at 30% lowerpower than GDDR5 at equivalent bandwidth.
Designed for scalability, power efficiency and manufacturability, the XDR2 architectureis a complete memory solution ideally suited for high-performance gaming, graphics andmulti-core compute applications.
Initial systems can achieve memory bandwidths of over 500GB/s into an SoC. EachXDR DRAM can deliver up to 38.4GB/s of peak bandwidth from a single, 4-byte-wide,
9.6Gbps XDR2 DRAM device, and the XDR2 architecture supports a roadmap to devicebandwidths of over 50GB/s.
DDR3 Memory Interface Solution
The Ram bus DDR3 memory interface solution is a high-performance, low-cost PHYtailored for consumer electronics. Ram bus' consumer DDR3 PHY solution is capable of
supporting data rates of up to 1600mega transfers per second (MT/s) ina low-cost wire bond package. Itincorporates patented innovations
such as on-chip Phase-Locked Loops(PLLs), Delay-Locked Loops(DLLs), Flex Phase TimingAdjustment circuits, Output DriverCalibration, and On Die Termination(ODT) Calibration to provide acomplete memory solution. ThePHY also provides backwardscompatibility for DDR2 SDRAMapplications.
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ROM
Pronounced ram, acronym for read-only memory, computer memory on which
data has been prerecorded. Once data has been written onto a ROM chip, it cannot beremoved and can only be read.
Unlike main memory (RAM), ROM retains its contents even when the computer is
turned off. ROM is referred to as being nonvolatile, whereas RAM is volatile.
Most personal computers contain a small amount of ROM that stores critical programs
such as the program that boots the computer. In addition, ROMs are used extensively in
calculators and peripheral devices such as laser printers, whose fonts are often stored in
ROMs.
A variation of a ROM is a PROM (programmable read-only memory). PROMs are
manufactured as blank chips on which data can be written with a special device called a
PROM programmer .
Types of ROM Chips
PROM
Short for Programmable Read Only Memory, Programmable ROM, or
PROM is a computer memory chip capable of being programmed. Once the PROM has
been programmed, the information written is permanent and cannot be erased or deleted.
A good example of a PROM is the computer BIOS.
EPROM
Short for Eras able Programmable Read-Only Memory, ERPOM is a memory
chip that was invented by Dov Frohman that can be read from but not stored to.
However, if exposed to ultraviolet light and can be reprogrammed if needed. Hardware
manufactures use EPROM when it may be needed that the data contained on the
EPROM needs to be changed. An EPROM chip is easily distinguishable by a small glass
circle that exposes the chip that can be reprogrammed.
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EEPROM
Short for Electrically Eras able Programmable Read-Only Memory, EEPROM is
a PROM that can be erased and reprogrammed using an electrical charge.
Unlike most memory inside a computer, this memory remembers data when the power is
turned off. EEPROM is often used to store information for the computer's BIOS.
Latest Storage devices.
CPU
Pronounced as separate letters it is the abbreviation for central processing unit.
The CPU is the brains of the computer. Sometimes referred to simply as the central
processor, but more commonly called processor,
the CPU is where most calculations take place. In
terms of computing power, the CPU is the most
important element of a computer system.
On large machines, CPUs require one or more
printed circuit boards. On personal computers and
small workstations, the CPU is housed in a single
chip called a microprocessor. Since the 1970's the
microprocessor class of CPUs has almost completely overtaken all other CPU
implementations.
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The CPU itself is an internal component of the computer. Modern CPUs are small and
square and contain multiple metallic connectors or pins on the underside. The CPU is
inserted directly into a CPU socket, pin side down, on the motherboard. Each
motherboard will support only a specific type or range of CPU so you must check the
motherboard manufacturer's
specifications before
attempting to replace or
upgrade a CPU. Modern
CPUs also have an attached
heat sink and small fan that
go directly on top of the CPU
to help dissipate heat.
Two typical components of a
CPU are the following:
The arithmetic logic unit (ALU), which performs arithmetic and logical operations.
The control unit (CU), which extracts instructions from memory and decodes and
executes them, calling on the ALU when necessary.
List of Intel microprocessors
12 32-bit processors: P5 micro architectureo 12.1 Original Pentiumo 12.2 Pentium with MMX Technology
13 32-bit processors: P6/Pentium M micro architectureo 13.1 Pentium Proo 13.2 Pentium IIo 13.3 Celeron (Pentium II-based)o 13.4 Pentium IIIo 13.5 Pentium II and III Xeono 13.6 Celeron (Pentium III Coppermine-based)o 13.7 Celeron (Pentium III Tualatin-based)o 13.8 Pentium Mo 13.9 Celeron Mo 13.10 Intel Coreo 13.11 Dual-Core Xeon LV
14 32-bit processors: Net Burst micro architecture
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o 14.1 Pentium 4o 14.2 Xeono 14.3 Mobile Pentium 4-Mo 14.4 Pentium 4 EEo 14.5 Pentium 4Eo 14.6 Pentium 4F
15 64-bit processors: IA-64o 15.1 Itaniumo 15.2 Itanium 2
16 64-bit processors: Intel 64Net Burst micro architectureo 16.1 Pentium 4Fo 16.2 Pentium Do 16.3 Pentium Extreme Editiono 16.4 Xeon
17 64-bit processors: Intel 64Core micro architectureo 17.1 Xeono 17.2 Intel Core 2o 17.3 Pentium Dual Coreo 17.4 Celerono 17.5 Celeron M
18 32-bit processors: Intel 32Intel Atom 19 64-bit processors: Intel 64Nehalem micro architecture
o 19.1 Intel Pentiumo 19.2 Core i3o 19.3 Core i5o 19.4 Core i7o 19.5 Xeon
A CPU socket or CPU slotA CPU socket or CPU slot is a mechanical component that provides mechanical and
electrical connections between a device (usually a microprocessor) and a printed circuit
board (PCB). This allows the CPU to be replaced without risking the damage typically
introduced when using soldering tools.
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ne%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%2364-bit_processors:_Intel_64_.E2.80.93_Nehalem_microarchitecturehttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%2364-bit_processors:_Intel_64_.E2.80.93_Nehalem_microarchitecturehttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%2364-bit_processors:_Intel_64_.E2.80.93_Nehalem_microarchitecturehttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Intel_Pentiumhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Core_i3http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Core_i5http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Core_i7http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Xeon_4http://en.wikipedia.org/w/index.php?title=Mechanical_component&action=edit&redlink=1http://en.wikipedia.org/wiki/Microprocessorhttp://en.wikipedia.org/wiki/Printed_circuit_boardhttp://en.wikipedia.org/wiki/Printed_circuit_boardhttp://en.wikipedia.org/wiki/Printed_circuit_boardhttp://en.wikipedia.org/wiki/Printed_circuit_boardhttp://en.wikipedia.org/wiki/Microprocessorhttp://en.wikipedia.org/w/index.php?title=Mechanical_component&action=edit&redlink=1http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Xeon_4http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Core_i7http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Core_i5http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Core_i3http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Intel_Pentiumhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%2364-bit_processors:_Intel_64_.E2.80.93_Nehalem_microarchitecturehttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%2332-bit_processors:_Intel_32_.E2.80.93_Intel_Atomhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Celeron_M_2http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Celeronhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Pentium_Dual_Corehttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Intel_Core_2http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Xeon_3http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%2364-bit_processors:_Intel_64_.E2.80.93_Core_microarchitecturehttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Xeon_2http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Pentium_Extreme_Editionhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Pentium_Dhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Pentium_4F_2http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%2364-bit_processors:_Intel_64_.E2.80.93_NetBurst_microarchitecturehttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Itanium_2http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Itaniumhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%2364-bit_processors:_IA-64http://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Pentium_4Fhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Pentium_4Ehttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Pentium_4_EEhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Mobile_Pentium_4-Mhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Xeonhttp://c/Documents%20and%20Settings/Ozone%20Computer/Desktop/MY%20IDM%20Project%20jan%2022/assiment%202/DATA/M1%20-other/List_of_Intel_microprocessors.htm%23Pentium_48/2/2019 IDM Project
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Common sockets utilize retention clips that are designed to apply a constant force, which
must be overcome when a device is inserted. For chips that sport a high number of pin
outs, either zero-insertion force (ZIF) sockets or land grid array (LGA) sockets are used
instead. These designs apply a compression force once either a handle (for ZIF type) or a
surface plate (LGA type) is put into place. This provides superior mechanical retention
while avoiding the added risk of bending pins when inserting the chip into the socket.
CPU sockets are used in desktop and server computers (laptops typically use surface
mount CPUs). Because they allow easy swapping of components, they are also used for
prototyping new circuits.
Function
A CPU socket is often made up of plastic, a metal lever or latch, and metal
contacts for each of the pins or lands on the CPU. Most packages are keyed to ensure the
proper insertion of the CPU. CPUs with a PGA package are inserted into the socket and
the latch is closed. This has the effect of physically securing and protecting the CPU as
well as causing an electrical connection between all the CPU pins and the socket. In the
case of LGA, the CPU is placed onto the socket and a latch is closed over the CPU,
securing it. Most CPU sockets are designed to support the installation of a heatsink. It
must be able to protect the CPU from the weight of the heatsink (often very heavy in
weight relative to the CPU) particularly during the installation and removal, while also
ensuring that the heatsink makes good thermal contact with the CPU.
http://en.wikipedia.org/wiki/Desktop_computerhttp://en.wikipedia.org/wiki/Server_computerhttp://en.wikipedia.org/wiki/Laptophttp://en.wikipedia.org/wiki/Surface_mounthttp://en.wikipedia.org/wiki/Surface_mounthttp://en.wikipedia.org/wiki/Plastichttp://en.wikipedia.org/wiki/Metalhttp://en.wikipedia.org/wiki/Thermal_contacthttp://en.wikipedia.org/wiki/Thermal_contacthttp://en.wikipedia.org/wiki/Metalhttp://en.wikipedia.org/wiki/Plastichttp://en.wikipedia.org/wiki/Surface_mounthttp://en.wikipedia.org/wiki/Surface_mounthttp://en.wikipedia.org/wiki/Laptophttp://en.wikipedia.org/wiki/Server_computerhttp://en.wikipedia.org/wiki/Desktop_computer8/2/2019 IDM Project
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Socket
name
Year
of
introd
uction
CPU familiesPacka
ge
Pin
countBus speed
DIP
1970s
Intel 8086
Intel 8088 DIP 40 5/10 MHz
PLCC ?
Intel 80186
Intel 80286
Intel 80386
PLCC 68, 132 6-40 MHz
Socket 1 1989 Intel 80486 PGA 169 16-50 MHz
Socket 2
Intel 80486 PGA 238 16-50 MHz
Socket 3 1991 Intel 80486 PGA 237 16-50 MHz
Socket 4
Intel Pentium PGA 273 60-66 MHz
Socket 5
Intel Pentium
AMD K5
IDT WinChip C6
IDT WinChip 2
PGA 320 50-66 MHz
Socket 6
Intel 80486 PGA 235
Socket 7 1994
Intel Pentium
Intel Pentium MMX
AMD K6
PGA 321 50-66 MHz
Super
Socket 71998
AMD K6-2
AMD AMD K6-III
Rise mP6
Cyrix MII
PGA 321 66-100 MHz
Socket 8 1995 Intel Pentium Pro PGA 387 60-66 MHz
Slot 1 1997
Intel Pentium II
Intel Pentium III
Slot 242 66-133 MHz
Slot 2 1998 Intel Pentium II Xeon Slot 330 100-133 MHz
Socket
463/
Socket
NexGen
NexGen Nx586 PGA 463
Socket
499Alpha 21164A Slot 587
Slot A 1999 AMD Athlon Slot 242 100 MHz
http://en.wikipedia.org/wiki/Dual_in-line_packagehttp://en.wikipedia.org/wiki/Dual_in-line_packagehttp://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/8086http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/8088http://en.wikipedia.org/wiki/Plastic_leaded_chip_carrierhttp://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/80186http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/80286http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/80386http://en.wikipedia.org/wiki/Socket_1http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/80486http://en.wikipedia.org/wiki/Socket_2http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/80486http://en.wikipedia.org/wiki/Socket_3http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/80486http://en.wikipedia.org/wiki/Socket_4http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Intel_P5http://en.wikipedia.org/wiki/Socket_5http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Intel_P5http://en.wikipedia.org/wiki/Advanced_Micro_Deviceshttp://en.wikipedia.org/wiki/AMD_K5http://en.wikipedia.org/wiki/Integrated_Device_Technologyhttp://en.wikipedia.org/wiki/WinChiphttp://en.wikipedia.org/wiki/Socket_6http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/80486http://en.wikipedia.org/wiki/Socket_7http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Intel_P5http://en.wikipedia.org/wiki/Pentium_MMXhttp://en.wikipedia.org/wiki/Advanced_Micro_Deviceshttp://en.wikipedia.org/wiki/AMD_K6http://en.wikipedia.org/wiki/Super_Socket_7http://en.wikipedia.org/wiki/Super_Socket_7http://en.wikipedia.org/wiki/AMD_K6-2http://en.wikipedia.org/wiki/AMD_K6-IIIhttp://en.wikipedia.org/wiki/Rise_Technologyhttp://en.wikipedia.org/wiki/MP6http://en.wikipedia.org/wiki/MIIhttp://en.wikipedia.org/wiki/Socket_8http://en.wikipedia.org/wiki/Pentium_Prohttp://en.wikipedia.org/wiki/Slot_1http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Pentium_IIhttp://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Pentium_IIIhttp://en.wikipedia.org/wiki/Slot_2http://en.wikipedia.org/wiki/Pentium_II_Xeonhttp://en.wikipedia.org/wiki/NexGenhttp://en.wikipedia.org/wiki/Nx586http://en.wikipedia.org/wiki/Alpha_21164Ahttp://en.wikipedia.org/wiki/Slot_Ahttp://en.wikipedia.org/wiki/AMDhttp://en.wikipedia.org/wiki/Athlonhttp://en.wikipedia.org/wiki/Athlonhttp://en.wikipedia.org/wiki/AMDhttp://en.wikipedia.org/wiki/Slot_Ahttp://en.wikipedia.org/wiki/Alpha_21164Ahttp://en.wikipedia.org/wiki/Nx586http://en.wikipedia.org/wiki/NexGenhttp://en.wikipedia.org/wiki/Pentium_II_Xeonhttp://en.wikipedia.org/wiki/Slot_2http://en.wikipedia.org/wiki/Pentium_IIIhttp://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Pentium_IIhttp://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Slot_1http://en.wikipedia.org/wiki/Pentium_Prohttp://en.wikipedia.org/wiki/Socket_8http://en.wikipedia.org/wiki/MIIhttp://en.wikipedia.org/wiki/MP6http://en.wikipedia.org/wiki/Rise_Technologyhttp://en.wikipedia.org/wiki/AMD_K6-IIIhttp://en.wikipedia.org/wiki/AMD_K6-2http://en.wikipedia.org/wiki/Super_Socket_7http://en.wikipedia.org/wiki/Super_Socket_7http://en.wikipedia.org/wiki/AMD_K6http://en.wikipedia.org/wiki/Advanced_Micro_Deviceshttp://en.wikipedia.org/wiki/Pentium_MMXhttp://en.wikipedia.org/wiki/Intel_P5http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Socket_7http://en.wikipedia.org/wiki/80486http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Socket_6http://en.wikipedia.org/wiki/WinChiphttp://en.wikipedia.org/wiki/Integrated_Device_Technologyhttp://en.wikipedia.org/wiki/AMD_K5http://en.wikipedia.org/wiki/Advanced_Micro_Deviceshttp://en.wikipedia.org/wiki/Intel_P5http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Socket_5http://en.wikipedia.org/wiki/Intel_P5http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Socket_4http://en.wikipedia.org/wiki/80486http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Socket_3http://en.wikipedia.org/wiki/80486http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Socket_2http://en.wikipedia.org/wiki/80486http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Socket_1http://en.wikipedia.org/wiki/80386http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/80286http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/80186http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Plastic_leaded_chip_carrierhttp://en.wikipedia.org/wiki/8088http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/8086http://en.wikipedia.org/wiki/Intelhttp://en.wikipedia.org/wiki/Dual_in-line_package8/2/2019 IDM Project
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19
Slot B Alpha 21264 Slot 587
Socket
3701999
Intel Pentium III
Intel Celeron
VIA Cyrix III
VIA C3
PGA 370 66-133 MHz
Socket
462/
Socket A
2000
AMD Athlon
AMD Duron
AMD Athlon XP
AMD Athlon XP-M
AMD Athlon MP
AMD Sempron
PGA 462
100-200 MHz This
is a double data rate
bus having a 400
MT/s
(megatransfers/seco
nd) fsb in the later
models
Socket
4232000 Intel Pentium 4 PGA 423
400 MT/s
(100 MHz)
Socket
478/
Socket N
2000
Intel Pentium 4
Intel Celeron
Intel Pentium 4 EE
Intel Pentium 4 M
PGA 478400-800 MT/s (100-
200 MHz)
Socket
4952000 Intel Celeron PGA 495
Socket
6032001 Intel Xeon PGA 603
400-533 MT/s (100-
133 MHz)
Socket
6042002 Intel Xeon PGA 604
400-1066 MT/s
(100-266 MHz)
Socket
7542003
AMD Athlon 64
AMD Sempron
AMD Turion 64
PGA 754 200-800 MHz
Socket
9402003 AMD Opteron Athlon 64 FX PGA 940 200-1000 MHz
Socket
4792003
Intel Pentium M
Intel Celeron MPGA 479[9]
400-533 MT/s (100-
133 MHz)
Socket
9392004
AMD Athlon 64
AMD Athlon 64 FX
AMD Athlon 64 X2
AMD Opteron
PGA 939 200-1000 MHz
LGA
775/2004 Intel Pentium 4
Intel Pentium DLGA 775 1600 MHz
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ki/Cyrix_IIIhttp://en.wikipedia.org/wiki/VIA_Technologieshttp://en.wikipedia.org/wiki/Celeronhttp://en.wikipedia.org/wiki/Pentium_IIIhttp://en.wikipedia.org/wiki/Socket_370http://en.wikipedia.org/wiki/Socket_370http://en.wikipedia.org/wiki/Alpha_212648/2/2019 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Socket T Intel Celeron
Intel Celeron D
Intel Pentium XE
Intel Core 2 Duo
Intel Core 2 Quad
Intel Xeon
Latest Processor sockets.
LGA
1366/
Socket B
2008 Intel Core i7 (900 series) LGA 1366 4.8-6.4 GT/s
LGA
1156/
Socket H
2009
Intel Core i7 (800 series)
Intel Core i5 (700, 600
series)
Intel Core i3 (500 series)
Intel Xeon (X3400, L3400
series)
Intel Pentium (G6000 series)
Intel Celeron (G1000 series)
LGA 1156 2.5 GT/s
LGA
12482010
Intel Intel Itanium 9300-
seriesLGA 1248 4.8 GT/s
LGA
15672010
Intel Intel Xeon 6500/7500-
seriesLGA 1567 4.8-6.4 GT/s
LGA
1155/
Socket
H2
(2011/
Q1)Intel Sandy Bridge-DT LGA 1155 2.5 GT/s
LGA2011/
Socket R
Future(2011/
Q3)
Intel Sandy Bridge B2 LGA 2011 4.8-6.4 GT/s
Socket
name
Year
of
introd
uction
CPU familiesPacka
ge
Pin
countBus speed
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CONTROL UNIT
The control unit maintains order within the computer system and directs
the flow of traffic (operations) and data. The flow of control is indicated by the
dotted arrows on figure 1-1. The control unit selects one program statement at
a time from the program storage area, interprets the statement, and sends the
appropriate electronic impulses to the arithmetic-logic unit and storage section to
cause them to carry out the instruction. The control unit does not perform the
actual processing operations on the data. Specifically, the control unit manages the
operations of the CPU, be it a single-chip microprocessor or a fill-size mainframe.
Like a traffic director, it decides when to start and stop (control and timing), what to
do (program instructions), where to keep information (memory), and with what
devices to communicate (I/O). It controls the flow of all data entering and leaving the
computer. It accomplishes this by communicating or interfacing with the
arithmetic-logic unit, memory, and I/O areas. It provides the computer with the
ability to function under program control. Depending on the design of the computer,
the CPU can also have the capability to function under manual control through
man/machine interfacing. The control unit consists of several basic logically defined
areas. These logically defined areas work closely with each other. Timing in a
computer regulates the flow of signals that control the operation of the computer.
The instruction and control portion makes up the decision-making and memory-type
functions. Addressing is the process of locating the operand (specific information)
for a given operation. An interrupt is a break in the normal flow of operation of a
computer (e.g., CTRL + ALT + DEL). Control memory is a random-access
memory (RAM) consisting of addressable storage registers. Cache memory is a
small, high-speed RAM buffer located between the CPU and main memory; it can
increase the speed of the PC. Read-only memory (ROM) are chips with a set of
software instructions supplied by the manufacturer built into them that enables the
computer to perform its I/O operations. The control unit is also capable of shutting down
the computer when the power supply detects abnormal conditions. ARITHMETIC-
LOGIC UNIT The arithmetic-logic unit (ALU) performs all arithmetic operations
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CPU speedy is improving its abilities. Here are latest CPUs
AMD Talks Llano & Radeon HD 6800
Written by Rob Williams on October 19, 2010 In AMD Processors
AMD invited both media and vendors down to Los Angeles last week to learn about the
company's upcoming products and technologies, such as the Fusion-based Llano CPU
(err, APU) and Radeon HD 6800 series. We were there, and have some preliminary
information on both, as well as some light information about the event itself.
Intel's Core i5-655K & i7-875K Unlocked Processors
Written by Rob Williams on May 28, 2010 In Intel Processors
Most of today's desktop CPUs, including budget models, tend to be
good for overclocking. But for those who are looking for the ultimate
in tweaking ability, Intel's mainstream models have left a bit to be desired. With the K
series, though, it aims to remedy that situation by offering unlocked models at affordable
prices.
Phenom II X6 1090T - AMD Enters the Six-Core Arena
Written by Rob Williams on April 28, 2010 In AMD Processors
In March, it was Intel's turn, and this month, it's AMD's. That's right,
we're at the point when Phenom II X6's are hitting the market and
giving consumers a much less expensive six-core CPU to chose from. We're taking a
look at AMD's top-end offering, the 1090T BE, and also a brief look at the company's
new 890FX chipset.
Intel's Core i7-980X Extreme Edition - Ready for Sick Scores?
Written by Rob Williams on March 10, 2010 In Intel Processors
It's official. We're now entering the six-core realm, thanks to Intel's
Gulftown. The first model, Core i7-980X, is more than capable of
delivering the sick scores that our title suggests, and along with it, we can begin to see
some major benefits of the 32nm process. To sweeten the deal further, Intel even
includes an effective new CPU cooler.
Intel's Core i3-530 - The Budget Powerhouse?
Written by Rob Williams on March 4, 2010 In Intel Processors
When Intel launched its Westmere-based line-up this past January, one
of the more interesting models released was the Core i3-530. The big
http://techgage.com/article/amd_talks_llano_radeon_hd_6800/http://techgage.com/article/intels_core_i5-655k_i7-875k_unlocked_processors/http://techgage.com/article/phenom_ii_x6_1090t_-_amd_enters_the_six-core_arena/http://techgage.com/article/intels_core_i7-980x_extreme_edition_-_ready_for_sick_scores/http://techgage.com/article/intels_core_i3-530_-_the_budget_powerhouse/http://techgage.com/article/intels_core_i5-655k_i7-875k_unlocked_processors/http://techgage.com/article/phenom_ii_x6_1090t_-_amd_enters_the_six-core_arena/http://techgage.com/article/intels_core_i7-980x_extreme_edition_-_ready_for_sick_scores/http://techgage.com/article/intels_core_i3-530_-_the_budget_powerhouse/http://techgage.com/article/intels_core_i5-655k_i7-875k_unlocked_processors/http://techgage.com/article/phenom_ii_x6_1090t_-_amd_enters_the_six-core_arena/http://techgage.com/article/intels_core_i7-980x_extreme_edition_-_ready_for_sick_scores/http://techgage.com/article/intels_core_i3-530_-_the_budget_powerhouse/http://techgage.com/article/intels_core_i5-655k_i7-875k_unlocked_processors/http://techgage.com/article/phenom_ii_x6_1090t_-_amd_enters_the_six-core_arena/http://techgage.com/article/intels_core_i7-980x_extreme_edition_-_ready_for_sick_scores/http://techgage.com/article/intels_core_i3-530_-_the_budget_powerhouse/http://techgage.com/article/intels_core_i5-655k_i7-875k_unlocked_processors/http://techgage.com/article/phenom_ii_x6_1090t_-_amd_enters_the_six-core_arena/http://techgage.com/article/intels_core_i7-980x_extreme_edition_-_ready_for_sick_scores/http://techgage.com/article/intels_core_i3-530_-_the_budget_powerhouse/http://techgage.com/article/intels_core_i3-530_-_the_budget_powerhouse/http://techgage.com/article/intels_core_i7-980x_extreme_edition_-_ready_for_sick_scores/http://techgage.com/article/phenom_ii_x6_1090t_-_amd_enters_the_six-core_arena/http://techgage.com/article/intels_core_i5-655k_i7-875k_unlocked_processors/http://techgage.com/article/amd_talks_llano_radeon_hd_6800/8/2/2019 IDM Project
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reason was its budget $120 price tag. But if there's one thing that can make a budget chip
interesting, it's overclocking, and fortunately, there's huge potential where this chip is
concerned.
Dream Processor for the Graphics Industry Intel Core i7 Extreme
The previous article was an introduction to Speed King Intel i7Core 975 Extreme Edition flagship processor. As only anintroduction is not enough to completely describe the processor, weconducted several tests with the processor and prepared a reviewthat targets the Graphics and the Animation industry. If you need a
one line conclusion
Quad-Core and Multi-Core Xeon
Intel released relabeled versions of its quad-core (2x2) Core
2 Quad processor as the Xeon 3200-series (product code80562) on 7 January 2007.[10]The 2x2 "quad-core" (dual-diedual-core[11]) comprised two separate dual-core die next toeach other in one CPU package. The models are the X3210,X3220 and X3230, running at 2.13 GHz, 2.4 GHz and2.66 GHz, respectively.[12]Like the 3000-series, thesemodels only support single-CPU operation and operate on a
1066 MHz front-side bus. It is targeted at the "blade" market. The X3220 is also brandedand sold asCore2 Quad Q6600, the X3230 as Q6700.
Model Speed (GHz) L2 Cache (MB) FSB (MHz) TDP (W)
X3210 2.13 2x4 1066 100/105
X3220 2.40 2x4 1066 100/105
X3230 2.66 2x4 1066 100
MotherboardThe main circuit board of a microcomputer. The
motherboard contains the connectors for attaching
additional boards. Typically, the motherboard
contains the CPU, BIOS, memory, mass storage
interfaces, serial and parallel ports,expansion slots,
and all the controllers required to control standard
peripheral devices, such as the display screen,
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keyboard, and disk drive. Collectively, all these chips that reside on the motherboard are
known as the motherboard's chipset.
On most PCs, it is possible to add memory chips directly to the motherboard. You may
also be able to upgrade to a faster PC by replacing the CPU chip. To add additional core
features, you may need to replace the motherboard entirely.
Motherboard is sometimes abbreviated as mobo.
The block diagram of a computer
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Main types of computers
1. Historic evolution2. Size and cost3. Data representation4. Purpose of the computer
1.0Historic evolutionFirst Generation (1940-1956) Vacuum Tubes
The first computers used vacuum tubes for circuitry and magnetic drums for memory,
and were often enormous, taking up entire rooms. They were very expensive to operate
and in addition to using a great deal of electricity, generated a lot of heat, which wasoften the cause of malfunctions.
First generation computers relied on machine language, the lowest-level programming
language understood by computers, to perform operations, and they could only solve one
problem at a time. Input was based on punched cards and paper tape, and output was
displayed on printouts.
The UNIVAC and ENIAC computers are examples of first-generation computing
devices. The UNIVAC was the first commercial computer delivered to a business client,
the U.S. Census Bureau in 1951.
Second Generation (1956-1963) Transistors
Transistors replaced vacuum tubes and ushered in the second generation of computers.
The transistor was invented in 1947 but did not see widespread use in computers until the
late 1950s. The transistor was far superior to the vacuum tube, allowing computers to
become smaller, faster, cheaper, more energy-efficient and more reliable than their first-
generation predecessors. Though the transistor still generated a great deal of heat that
subjected the computer to damage, it was a vast improvement over the vacuum tube.
Second-generation computers still relied on punched cards for input and printouts for
output.
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Second-generation computers moved from cryptic binary machine language to symbolic,
or assembly, languages, which allowed programmers to specify instructions in words.
High-level programming languages were also being developed at this time, such as early
versions of COBOL and FORTRAN. These were also the first computers that stored
their instructions in their memory, which moved from a magnetic drum to magnetic core
technology. The first computers of this generation were developed for the atomic energy
industry.
Third Generation (1964-1971) Integrated Circuits
The development of the integrated circuit was the hallmark of the third generation of
computers. Transistors were miniaturized and placed on silicon chips, called
semiconductors, which drastically increased the speed and efficiency of computers.
Instead of punched cards and printouts, users interacted with third generation computers
through keyboards and monitors and interfaced with an operating system, which allowed
the device to run many different applications at one time with a central program that
monitored the memory. Computers for the first time became accessible to a mass
audience because they were smaller and cheaper than their predecessors.
Fourth Generation (1971-Present) Microprocessors
The microprocessor brought the fourth generation of computers, as thousands of
integrated circuits were built onto a single silicon chip. What in the first generation filled
an entire room could now fit in the palm of the hand. The Intel 4004 chip, developed in
1971, located all the components of the computerfrom the central processing unit and
memory to input/output controlson a single chip.
In 1981 IBM introduced its first computer for the home user, and in 1984 Apple
introduced the Macintosh. Microprocessors also moved out of the realm of desktop
computers and into many areas of life as more and more everyday products began to use
microprocessors.
As these small computers became more powerful, they could be linked together to form
networks, which eventually led to the development of the Internet. Fourth generation
computers also saw the development ofGUIs, the mouse and handheld devices.
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