Related Clues:

• Tree-hugger's prefix
• Patron
• One providing input
• Surfer, so to speak
• Tech support caller
• Logical beginning?
• Mouse mover
• PC operator
• Internet explorer?
• See 34-Down
• Exploitative one
• Type of ID
• One with a habit
• ''The Name of the Rose'' author
• 'A Theory of Semiotics' author