Related Clues:

• User interface
• For
• 'Our Gang' member
• Hood of 'Our Gang' comedies
• A PC may use it
• It helps many machines run
• Windows underpinning
• Windows forerunner
• Early IBM PC go-with
• Friend of Alfalfa
• Child actress Hood
• It was opened before Windows
• Basic PC program
• Forerunner of Windows
• Old PC operating system