Related Clues:

• The "U" of BTU
• Apartment, to an apartment manager
• One Adam Twelve, e.g.
• It may be written on a chalkboard
• School period
• Parable feature
• Monad
• Peck, e.g.
• Foot or fathom
• Military detachment
• Work crew
• Condo, for instance
• Single undivided entity
• The "U" of CPU
• Subsidiary