Related Clues:

• Sign up (for)
• Frequent stage direction
• Become part of
• Punch in
• ''Abandon hope, all ye who ___ here''
• Input, as data
• ''Come in!''
• Rectangular computer key
• Step onstage
• Prepare to serve
• Frequently used key
• Walk through the door
• Walk right in
• Work with data, in a way
• Sign for a hitch