What is required when more than one person uses a central computer at the same t

What is required when more than one person uses a central computer at the same time?

View More Related Question

1) Which of the following is not a valid size of a Floppy Disk?

2) What is the name of the display feature that highlights are of the screen which requires operator attention?

3) Which of the following is not an electronic computer?

4) Which of the following device was not invented by Babbage?

5) Which of the following was a special purpose computer?