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CHAPTER 2 : COMPUTER HARDWARE (PART 1 : INPUT (Keyboard (Wireless,…
CHAPTER 2 : COMPUTER HARDWARE
PART 1 : INPUT
Data or instructions entered into memory of computer
Two types of input : Data , Instruction
Keyboard
Wireless, Ergonomic and Portable
Pointing Devices
Trackball, Digital pen and mouse
Voice input
Webcam, Video conferencing
Scanners and Reading Devices
Optical scanner, Optical readers, Bar code reader, RFID readers and magnetic stripe cardreaders
PART 2 : OUTPUT
Display Device
LCD Monitor, CRT monitor
Nonimpact printers
Photo printer, laser printer, label printer & postage printers, thermal printer, mobile printer
Impact printers
Dot-matrix printer, Line printer
Other output devices
Data Projector
Facsimile (fax) machine
Multi-function peripheral
Interactive whiteboard
PART 3 : STORAGE AND DATA PRESENTATION
The system unit
Case that contains electronic components of the computer used to process data
Common components inside
Processor, Memory, Adapter cards, Drive bays and power supply
What is capacity
Number of bytes a storage can hold
Kilobyte, Megabyte, Gigabyte, Terabyte, Petabyte, Exabyte, Zettabyte and Yottabyte
What is a storage device
Hardware that records and retrieves items to and from storage media
Reading, Writing
What is a floppy disk
Portable, inexpensive storage medium (also called diskette)
What is a CD-ROM
Compact disc read-only memory
Cannot erase or modify contents
Commonly used to distribute multimedia and complex software