Post on 04-Jul-2015
Computer Hardware
Computer
An electronic device that is programmed to receive data, change the data to information, present the information and store the information
Computer System
A computer and all the devices connected to it.
Categories of Computers
Microcomputer Small des ktop s ize 10,000Priced under $ — , Home computers word proces s ing
, education Internet us e — Pers onal Computers us ed in
/ bus ines s can us e many input output, devices communicate with larger
computers — Portable computers s imilar to home
computers but lightweight and, compact battery operated
MinicomputerMore powerful than
microcomputerCan support a large
number of users performing different tasks
Cost from $25,000 to several $100,000
Main FrameProcess
transactions at a very high rate
Can handle numerous users
Store large amounts of data
Priced from several $100,000 to several million
Requires specialized environment
Super Computers
The largest most powerful computers
Represents the most advanced technology
Used by military, NASA and others
Factors in Classification of Computers
PriceSize SpeedProcessing Capabilities
Computer Program
Set of commandsList of instructions that “tells” computer
what to do.Written in special languagesAllows computer to change data into
information.
DATA
Raw facts entered into the computer
Information
Result of data processing