DESTOP AND LAPTOP COMPUTERS

DESTOP COMPUTERS• MONITOR• CPU• MOUSE• KEY BOARD• HARD DISK DRIVE • RAM• MODEM• SPEAKER• CD AND DVD DRIVES• PRINTER

MONITOR

A monitor or a display is an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors use a cathode ray tube (CRT) about as deep as the screen size.Originally, computer monitors were used for data processing while television receivers were used for entertainment. From the 1980s onwards, computers (and their monitors) have been used for both data processing and entertainment, while televisions have implemented some computer functionality. The common aspect ratio of televisions, and then computer monitors, has also changed .

C.P.U

C.P.U Is the hardware with in a computer that carries out of instructions of the computer programme by performming the basic arthamatical, logical and input/ output operations of system• A computer can have more than more one CPU .this called multiprosising..• some integrated circuits (ics) can contain multiple CPU on single chip .those ics are called multicore process

RAM

RANDOM ACCES MEMORYIt is a form of computer data is storage .a random access alows stored

data to be assed directly in random order .in contract ,other data storage media such as hard disk ,CD,DVD magnetic tape as well us primary memory type such as drum memory

Key board

key board • Key board is the one of the major part of a computer

• key board is the primary controller of the computer

MOUSE

• a mouse is a pointing device that functions by detecting two-dimensional motion relative to its supporting surface. Physically, a mouse consists of an object held under one of the user's hands, with one or more buttons.

The mouse sometimes features other elements, such as "wheels", which allow the user to perform various system-dependent operations, or extra buttons or features that can add more control or dimensional input

HARD DISC DRIVE• A hard disk drive (HDD)is a data storage device used for storing and

retrieving digital information using rapidly rotating discs (platters) coated with magnetic material.

• An HDD retains its data even when powered off. Data is read in a random-access manner, meaning individual blocks of data can be stored or retrieved in any order rather than sequentially.

• An HDD consists of one or more rigid ("hard") rapidly rotating discs (platters) with magnetic heads arranged on a moving actuator arm

to read and write data to the surfaces.

MODEM • A modem (modulator-demodulator) is a device that

modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information.

• The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used with any means of transmitting analog signals, from light emitting diodes to radio.

• The most familiar example is a voice band modem that turns the digital data of a personal computer into modulated electrical signals in the voice frequency range of a telephone channel.

• These signals can be transmitted over telephone lines and demodulated by another modem at the receiver side to recover the digital data

SPEAKER

Computer speakers, or multimedia speakers were introduced by altec lansing in 1990.1] They are speakers external to a computer, that disable the lower fidelity built-in speaker. They often have a low-power internal amplifier. The standard audio connection is a 3.5 mm (approximately 1/8 inch) stereo phone connector often color-coded lime green (following the PC 99 standard) for computer sound cards.

CD & DVD DRIVES• In computing, an optical disc drive (ODD) is a

disk drive that uses laser light or electromagnetic waves within or near the visible light spectrum as part of the process of reading or writing data to or from optical discs.

• Some drives can only read from discs, but recent drives are commonly both readers and recorders, also called burners or writers.

• Compact discs, DVDs, and Blu-ray discs are common types of optical media which can be read and recorded by such drives. Optical drive is the generic name; drives are usually described as "CD" "DVD", or "Blu-

ray", followed by "drive", "writer", etc.

PRINTERS

• A computer printer is a computer peripheral device that produces a hard copy (permanent human-readable text and/or graphics usually on paper) from data stored in a computer connected to it.

• A virtual printer is a piece of computer software whose user interface and API resemble that of a printer driver, but which is not connected with a physical computer printer

LAPTOP

CHANGING T

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DIFFERS B/W LAPTOP & DESTOP

• HOW LAPTOPS ARE LIKE DESKTOPSFor the most part, laptops have the same major parts as desktops: microprocessor

• operating system • solid-state memory • disk drives • input/output ports • sound cards and speakers

MICRO PROCESSER• Microprocessors

Like standard desktops, laptops are powered by microprocessors. The microprocessor is the brain of the laptop and coordinates all of the computer's functions according to programmed instructions (that is, the operating system software).

• The DX-4 processor shown in the photo below is no longer used, but it is typical of modern laptop microprocessors in that it is customized for laptop use. A typical laptop processor has features that reduce power consumption and heat.

• For example, laptop processors often run at a lower voltage and often have multiple sleep or slow-down modes that significantly increase battery life.

OPERATING SYSTEM

• The phrase operating system refers to set of programs that manage computer hardware resources and also provide common services for application software. It supports basic a computer's functions, such as scheduling tasks, controlling peripherals and executing applications. Android, iOS, Linux, Mac OS X, BSD, and Microsoft Windows are examples of operating systems.

SOLID STATE MEMORY• The idea of using flash-based storage in a notebook isn't new.

Nevertheless, the high cost of flash has prevented it from replacing hard-disk drives on mainstream notebook PCs, despite some advantages in power consumption, shock resistance, and speed--until now.

• Photograph: Robert CardinAs prices continue to drop, flash-based solid-state drives (SSDs) have become viable options for handling your notebook's primary storage requirements. Moreover, today's roomiest SSDs have 32GB of memory, enough to do more than satisfy basic storage needs--making them competitive with 1.8-inch hard-disk drives, which range in capacity from 30GB to 80GB. These SSDs, available from companies like Samsung and SanDisk, are lightweight (the SanDisk UATA 5000, for example, weighs 59 grams--just over 2 ounces) and can be found in portables from Dell, Fujitsu, and Toshiba.

SYSTEM MEMORY SCREEN

OPTICAL DRIVE

• An optical drive allows you to play back media from—and burn data to—CDs, DVDs, and Blu-ray discs.

• Traditionally, optical drives have been modular in design, but lately we’ve seen more notebooks with slot-loading drives, which forgo a pop-out tray for an eject button on the keyboard (you’ll find this on all Apple notebooks and the Dell XPS series, among others).

NETWORKING VIDEO CARD