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Q: Unix operating system was developed in 1970s by
  • A. Moto Labs
  • B. Microsoft Labs
  • C. IBM Labs
  • D. Bell Labs
Correct Answer: Option D - The Unix operating system was developed at the Bell Laboratory in 1969-70. It is a multiuser and multitasking operating system, widely used as a master control programme in work places and servers.
D. The Unix operating system was developed at the Bell Laboratory in 1969-70. It is a multiuser and multitasking operating system, widely used as a master control programme in work places and servers.

Explanations:

The Unix operating system was developed at the Bell Laboratory in 1969-70. It is a multiuser and multitasking operating system, widely used as a master control programme in work places and servers.