UNIX was trademarked in 1969 by a group of AT&T employees at Bell Labs as a ______________ and ______________ computer operating system.
UNIX was trademarked in 1969 by a group of AT&T employees at Bell Labs as a ______________ and ______________ computer operating system.
(A) Smartphone
(B) Tablet Devices
(C) Microsoft
(D) Multitasking
(E) Multi-User
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