Crossword Heaven

Answer: UNIX

UNIX is a crossword puzzle answer that we have spotted 80 times.

• Computer operating system developed by Bell Labs
• Windows alternative
• Operating system on many Internet servers
• System for servers
• Alternative to Windows
• Popular computer operating system
• Operating system developed at Bell Labs
• Computer workstation operating system
• Computer operating system developed at AT&T
• Basis of Mac OS X
• Popular multi-user operating system
• Computer operating system
• Computer operating system since the '60s
• Linux alternative
• Multiuser computer operating system
• Server system
• Original operating system with "grep" searches
• Mac OS X is based on it
• The C programming language was developed for it
• Early computer operating system
• Widely used operating system
• System developed at Bell Labs
• Basis of the Solaris Operating System
• System developed at Bell Laboratories
• Operating system that doesn't do Windows?
• Computer system developed at AT&T
• DOS alternative
• Computer system since the '60s
• Widely used computer operating system
• Computer system
• Alternative to DOS
• Computer operating system developed at Bell Labs
• DOS rival
• PC operating system
• System for some servers
• Computer system developed at AT
• Bell Labs operating system
• Servers run it, often
• MS-DOS alternative
• Alternative to DOS or Windows
• Certain operating system
• Bell Labs op-sys name
• Operating system option
• Operating system since the '60s
• Operating system since 1969
• Bell Labs server system
• Longtime computer operating system
• Trademark DOS
• PC system
• It has "batch" and "patch" commands
• OS X basis
• Bell Labs system
• Operating system developed by AT&T originally
• Computer system developed at Bell Labs
• Operating system choice
• Operating system used since the 1970s
• Source of the Mac's operating system
• Server OS
• Pioneering computer operating system
• System developed by Bell Labs
• Operating system with many clones
• Operating system in many servers
• System used by servers
• Linux forerunner
• Common operating system
• What macOS is based on
• Operating system type
• Operating system since the early '70s
• Operating system since the '70s
• Operating system since the 1970s
• Early operating system
• Venerable operating system
• Alternative to Linux
• Operating system from Bell Labs
• Operating system invented at Bell Labs
• See 55-Down
• Bell Labs development of the 1970s
• Common operating system for supercomputers, once
• Computer OS
• Operating system developed by Bell Labs