Related Clues:

• O.K.'d: Abbr.
• Name
• User interface
• For
• A PC may use it
• It helps many machines run
• Windows underpinning
• Windows forerunner
• Computer program, informally
• Kind of store
• Early IBM PC go-with
• P.C. program
• Software program, briefly
• It was opened before Windows
• Computer programs, for short