input,output devices
- Words:
- 1403
- Submitted:
- Tue Jul 28 2009
- Mark submitted by Author:


Have a little read: ... Input Devices Barcode Reader: A barcode reader (or barcode scanner) is an electronic device for reading printed barcodes. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating optical impulses into electrical ones. Additionally, nearly all barcode readers contain decoder circuitry analyzing the barcode's image data provided by the sensor and sending the barcode's content to the scanner's output port. Light pen: A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's CRT TV set or monitor. It allows the user to point to displayed objects, or draw on the screen, in a similar way to a touch screen but with greater positional accuracy. Joystick: A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Joysticks are
BETTER MARKS THAN I EVER HOPED FOR
A FANTASTIC HELP
Secure low cost access to the largest collection of model answers anywhere...
Finally, did you know, we are the only essay site certified as safe by the Credit Card industry? (100% PCI DSS compliant). You can feel 100% secure accessing the largest collection of model answers on the Internet - plus our very low price means even struggling students can afford to get help fast. Start now...
- Feel secure and in control - the ultimate stress buster
- We're the only site with over 1 Million monthly visitors
- You'll instantly spot winning structures and ideas - FAST!
- Backed by Anti-plagiarism experts
- Your revision, essays or coursework DONE! Just 17p!










