Possible Clues:

• Keyboard alternative
• When spelled out, word that follows the beginnings of the starred answers in a memorable kids' show theme song
• Creature whose movements are captured on screen
• Computer equipment apostrophized by Burns
• One that squeaks by?
• Second employment for a retiring person
• Does it think about nothing but cheese?
• A timid little computer operator
• Gus in "Cinderella"
• Nothing to think about in control of computer