Software Collection of instructions that tell the computer what
to do Types: 1. System Software 2. Application Software
Slide 4
Operating Systems Interface between the user, the application
software and the computer Examples: Windows (8,7, Vista, XP) Mac OS
(Mountain Lion, Leopard, OSX) Linux Android IOS
Slide 5
Interface - The way the user communicates with the user Types:
1. Graphical User Interface 2. Command Line 3. Voice
Recognition
Slide 6
Application Software Performs specific tasks Examples:
Microsoft Word Internet Explorer Angry Birds
Slide 7
System Software Utilities - Used to optimize or maintain a
computer Examples: Disk Defragmenter Screen Saver File Compression
Others
Slide 8
Desktop Computer displays all drives and hardware Window Views
ways to arrange multiple windows (right click on task bar) Cascade,
Tile Horizontal, & Tile Vertically Active Window window you are
currently working in
Slide 9
Special Keys Alt used with an underlined menu character Ctrl
performs a command within a menu Windows opens the start menu
Aerosnap maximizes the window Aeroshake minimizes all other
windows
Slide 10
Screen Shots Take a picture of what is on your monitor Print
Screen allows you to paste a picture of what is on your monitor Alt
Print Screen allows you to paste a picture of the active window
Snipping tool allows you to select what you want to create a
picture of whats on your monitor Clipboard temporary storage area,
where copied or cut items are saved
Slide 11
Computer Eras Pre-Computer Era not electronic Abacus, slide
rule, & mechanical calculator First Generation powered by
vacuum tubes Second Generation powered by transistors Third
Generation powered by integrated circuits Fourth Generation powered
by microprocessors Personal Computers Fifth Generation artificial
intelligence Allows the computer to think, learn, and reason
Slide 12
Types of Computers 1. Personal Computer 2. Mid-range Server 3.
Mainframe 4. Supercomputer
Slide 13
Data Data raw, unorganized Numbers, letters, symbols
Information data that has been processed and has meaning Bit-
binary digit, smallest unit of data Either a 1 or 0 Byte
combination of bits (8, 32, or 64 bits) 1 byte = 1 character
What is a Computer? An electronic device that has: 1. Input 2.
Processing 3. Output 4. Storage
Slide 16
Input Hardware Accepts data from the user Examples: Keyboards
Mouse Scanners Microphone Others?
Slide 17
Processing Hardware Microprocessor or Processor Speed is
measured in Hertz Other hardware inside system unit Motherboard
Expansion ports
Slide 18
Output Hardware Display the results (information) Examples:
Monitors/Screens Pixel block or dot of color Size measured
diagonally Printers Laser, Ink Jet, Dot Matrix, Specialty printers
Others?
Slide 19
Memory (Storage) Random Access Memory (RAM) Volatile temporary,
erased when power it turned off Read Only Memory Non-Volatile
permanent Magnetic floppies Optical CDs & DVDs Flash jump
drives, memory cards Remote
Slide 20
Considerations (Essential *) 1.Processor (type and speed) *
2.Memory (RAM) * 3.Drives (type/capacity) * 4.Peripherals(screen,
keyboard, mouse, speakers, etc.) * 5.Ports or connections (types
and locations) * 6.Price 7.Tasks it must perform Gaming,
productivity . 8.Chassis/Form Factor (footprint) 9.Platform (OS)
10.Networking (wired and wireless) 11.Bundled software 12.Potential
vendors 13.Warranty/Shipping/Support