Mainframe-perform multiple tasks for many users simultaneously
Super computer- meet its needs by processing trillions of calculations per sec.
Minicomputer-were common in the 1970 and1980
Professional workstation-needs users to require more computer power than personal computer
IBM and IBM COMPATIBLE COMPUTERS- When IBMs personal computer hit the market in 1991 eccepted by the business world
Hard ware- encompasses all physical components of computer
System unit- is unit the case that houses the computers internal processing circuitry
Motherboard- circuitry connected to main board
Central processing unit- CPU no more than a few inches square ,is responsible for logic instructions is known for a brain basic system
Read –only memory –ROM chips have instructions and data built in them
Random Access Memory- chips store data only temporal
Input devices- are external system unit attach to ports
Output devices-show results of the computer processing
Hard drive –is the storage device heart most computer systems
Flash memory-example holding 128MB
Operating system-the software program that oversees everything when turned on
User surface-the way user interacts when on computer
System software-includes the operating system utility program that maintain computer manegment
Platform-or computer envirment
Unix system-used in multiuser environment
Syntax –user-friendly computer graphical intersurface a unix
Xerox’s PARC research –built Alto computer
Graphical user intersuface- let’s user see what to click on with mouse and screen or image
MD-DOS-the first PC compatitble
Microsoft windows-corp. introduced a graphical user called windows
MAC OS- Apple computer brought GUI into personal use
Linux –is a powerful PC based on unix
Viruses-small piece to invade the computer hard drive