The ____ operating system was developed in 1969 at AT&T's Bell Labs.
A) Windows
B) Mac
C) UNIX
D) Linux

Name: The ____ operating system was developed in 1969 at AT&T's Bell Labs. A) Windows B) Mac C) UNIX D) Linux
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UNIX was developed in AT&T's Bell Labs in 1969. Windows was developed by Microsoft in 1985, Mac OS was developed by Apple in 1984, and Linux was initially released in 1991.

The ____ Operating System Was Developed in 1969 at AT&T's