Which of the following printer can produce a carbon copy?
Laser
Inkjet
Dot-matrix
LED
Which one is said to be an input device, largely used in super markets, commercial business fields etc?
Barcode reader
OMR
Track ball
Scanner
The main memory is generally referred to as :
Floppy disk
CD
RAM
All of these
Which one is said to be an input device used to take photographs without film?
Joystick
Trackball
Digital camera.
Computers that use microprocessors are called:
Micro computer
Abacus
UNIVAC
ENIAC
Which is an optical disk?
CD ROM
Hard disk
Tape
What is an MODEM?
Modulator and demodulator
A software for computer
Network card
Communication device
Who invented the first mechanical computer?
Charles Babbage
John Napier
Univac