HARD DISK COMPACT DISK DIGITAL VERSATAL DISK UNIVERSAL SERIAL BUS

IN COMPUTING, A KEYBOARD IS A TYPEWRITER-STYLE DEVICE, IN COMPUTING, A KEYBOARD IS A TYPEWRITER-STYLE DEVICE, WHICH USES AN ARRANGEMENT OF BUTTONS OR KEYE WHICH USES AN ARRANGEMENT OF BUTTONS OR KEYE TO ACT AS MECHANICAL LEVERS OR ELECTRONIC SWITCHES. TO ACT AS MECHANICAL LEVERS OR ELECTRONIC SWITCHES. FOLLOWING THE DECLINE OF PUNCH CARDDS FOLLOWING THE DECLINE OF PUNCH CARDDS AND PAPER TAPE, AND PAPER TAPE, A KEYBOARD TYPICALLY HAS CHARACTERS ENGRAVED OR PRINTED ON THE KEYS AND EACH PRESS OF A KEY TYPICALLY CORRESPONDS TO A SINGIE WRITTEN SYMBOI A KEYBOARD TYPICALLY HAS CHARACTERS ENGRAVED OR PRINTED ON THE KEYS AND EACH PRESS OF A KEY TYPICALLY CORRESPONDS TO A SINGIE WRITTEN SYMBOI HOWEVER, TO PRODUCE SOME SYMBOIS REQUIRES PRESSING AND HOLDIND SEVERAI KEYS SIMUITANEOUSIY OR IN SEQUENCE. HOWEVER, TO PRODUCE SOME SYMBOIS REQUIRES PRESSING AND HOLDIND SEVERAI KEYS SIMUITANEOUSIY OR IN SEQUENCE. WHILE MOST + WHILE MOST +

In computing, a mouse is a pointing device that functions by detecting two- dimensional motion relative to its supporting surface. Physically, a mouse consists of an object held under one of the user's hands, with one or more buttons. In computing, a mouse is a pointing device that functions by detecting two- dimensional motion relative to its supporting surface. Physically, a mouse consists of an object held under one of the user's hands, with one or more buttons. MOUSE IS INPUT DEVICE MOUSE IS INPUT DEVICE

Scanners are devices which bounce a light source against an image and convert the reflected light into a computer image. The file is saved in either a photographic format, or a black and white format and the file type is selectable by the user. The common formats include JPEG, BMP, PCX and GIF Scanners are devices which bounce a light source against an image and convert the reflected light into a computer image. The file is saved in either a photographic format, or a black and white format and the file type is selectable by the user. The common formats include JPEG, BMP, PCX and GIF.

TWO TYPES OF MONITOR LCD CRT LED

MONITOR IS OUTPUT DEVICE

The dot-matrix printer was a popular low-cost personal computer printer. It's an impact printer that strikes the paper a line at a time. The best- known non-impact printers are the inkjet printer, of which several makes of low-cost color printers are an example, and the leaser printer. The inkjet sprays ink from an ink cartridge at very close range to the paper as it rolls by. The laser printer uses a laser beam reflected from a mirror to attract ink (called toner ) to selected paper areas as a sheet rolls over a drum.

The Compact Disc, or CD for short, is an optical disc used to store digital data. It was originally developed to store and play back sound recordings only, but the format was later adapted for storage of data (CD-ROM), write-once audio and data storage (CD-R), rewritable media (CD-RW), Video Compact Discs (VCD), Super Video Compact Discs (SVCD), PhotoCD, PictureCD, CD-i, and Enhanced CD. Audio CDs and audio CD players have been commercially available since October 1982.

digital versatile disc or digital video disc (DVD), a small plastic disc used for the storage of digital data. The successor media to the compact disc (CD), a DVD can have more than 100 times the storage capacity of a CD. When compared to CD technology, DVD also allows for better graphics and greater resolution. In the case of an audio recording, where the data to be stored is in analog rather than digital form, the sound signal is sampled at a rate of 48,000 or 96,000 times a second, then each sample is measured and digitally encoded on the 43/4-in. (12-cm) disc as a series of microscopic pits on an otherwise polished surface. The disc is covered with a protective, transparent coating so that it can be read by a laser beam. As with other optical disks nothing touches the encoded portion, and the DVD is not worn out by the playing process. Because DVD players are backward compatible to existing technologies, they can play CD and CD-ROM discs; however, CD players cannot play DVD and DVD-ROM discs.compact disc optical disks

Universal Serial Bus (USB) is an industry standard developed in the mid-1990s that defines the cables, connectors and communications protocols used in a bus for connection, communication and power supply between computers and electronic devicesindustry standard communications protocolsbuscomputers