Related Clues:

• Scheduling abbr.
• Not yet decided: Abbr.
• Sched. notation
• Undecided's abbreviation
• Sched. slot that's open
• Sched. spaceholder
• "We'll let you know," on a TV schedule
• Schedule maker's abbr.
• Letters of uncertainty
• ''Still open,'' on a sched.
• ''Unknown,'' on a sched.
• Up in the air, on schedules
• Letters of indecision, on a schedule
• Schedule abbr
• TV sched. letters