COMPUTER SYSTEM- is a combinatin of software and hardware
---HARDWARE---
__CPU- Central Processing Unit__The processor chip that runs your computer.
__RAM- Random Access Memory__The part of the computer that temporarily holds a program and related files and manipulates data (non permanent).
---PERIPHERALS---
INPUT DEVICES
__Keyboard__
Keyboards are designed for the input of text and characters and also to control the operation of a computer.
__Mouse__
A mouse functions as a pointing device by detecting two-dimensional motion relative to its supporting surface. Physically, a mouse consists of a small case, held under one of the user's hands, with one or more buttons.
__Scanner__
Scanner is a device that analyzes images, printed text, or handwriting, or an object (such as an ornament) and converts it to a digital image. Most scanners today are variations of the desktop (or flatbed) scanner.
OUTPUT DEVICES
__Monitor__
Monitor is a piece of electrical equipment which displays viewable images generated by a computer without producing a permanent record.
__Printer__
Printer produces a hard copy (permanent human-readable text and/or graphics) of documents stored in electronic form, usually on physical print media such as paper or transparencies.
__Speakers__
Speakers are external speakers, commonly equipped with a low-power internal amplifier. The standard audio connection is a 3.5mm (1/8 inch) stereo jack plug often colour-coded lime green, following the PC 99 standard) for computer sound cards.
STORAGE DEVICES
__Hard Drive__
Hard drive a non-volatile storage device which stores digitally encoded data on rapidly rotating platters with magnetic surfaces.

__Floppy Drive__
__Zip Drive__
Zip drive is a medium-capacity removable disk storage system, introduced by Iomega in late 1994. Originally it had a capacity of 100 MB, but later versions increased this to first 250 MB and then 750 MB.