Who built the world's first electronic calculator using telephone relays, light bulbs and batteries?

The ability of a computer system to remain operational despite various failures is

The operation of a digital computer is based on _____ principle.

The ability of an operating system to control the activities of multiple programs at the same time is called .........

The access method used for cassette tape is

EBCDIC can code up to how many different characters?

What is the name given to the 8-bit unit used for coding data?

Which of the following chips can be reprogrammed with special electric pulses?