What is meant by quad-density (QD) diskette?

In analog computer

Which of the following is directry controlled from a keyboard.

Which of the following items is not used in Local Area Networks (LANs)

Which gate sends on a pulse when it receives one at either or both of its terminals.

In computers ,what is the smallest and basic unit of information storage?

An Integrated Circuit (IC) is

What are the individual dots which make up a picture on the monitor screen called?