Multiple choice technology Who co-created the UNIX operating system in 1969 with Dennis Ritchie? Bjarne Stroustrup Steve Wozniak Niklaus Wirth Ken Thompson Reveal answer Fill a bubble to check yourself D Correct answer Explanation Ken Thompson, alongside Dennis Ritchie, developed the UNIX operating system at Bell Labs in 1969. UNIX introduced fundamental concepts like the shell, hierarchical file system, and pipe mechanism that influenced all subsequent operating systems.