| 2026-03-14 | Letters for those awaiting specifics |
| 2025-12-14 | Letters for an unscheduled event |
| 2025-09-05 | Sched. placeholder |
| 2025-05-09 | Not yet final, in brief |
| 2025-04-01 | Letters on an incomplete schedule |
| 2024-12-28 | Schedule inits. |
| 2024-12-18 | "Check back later," in brief |
| 2024-04-12 | Letters in an empty slot |
| 2023-11-22 | Not yet determined: Abbr. |
| 2023-06-30 | Not yet known, for short |
| 2023-06-01 | As yet unknown, for short |
| 2022-09-19 | Pending, on a sched. |
| 2022-04-29 | Schedule abbr. |
| 2021-05-16 | "No info yet," on a schedule |
| 2020-12-28 | Unknown, on a sched. |
| 2020-10-30 | Schedule abbr. |
| 2020-08-30 | Timetable abbr. |
| 2019-12-06 | Abbr. for an open slot |
| 2019-12-01 | Letters on an incomplete syllabus |
| 2019-11-20 | Abbr. meaning "We'll fill this slot in later" |
| 2019-04-07 | "Don't know yet," on a schedule |
| 2019-02-28 | Not yet on the sched. |
| 2019-01-25 | Alternative to "?," in some listings |
| 2018-09-05 | Course list abbr. |
| 2018-08-16 | Up in the air, for short |
| 2018-05-19 | Sched. letters |
| 2018-03-25 | Placeholder letters |
| 2018-01-15 | Letters on an unfinished sched. |
| 2017-09-10 | Schedule inits. |
| 2017-08-23 | "Still open," on a sched. |
| 2017-06-26 | Letters on a schedule meaning "We'll let you know" |
| 2017-05-28 | Undecided, on a sked |
| 2017-05-03 | TV sked letters |
| 2017-03-21 | [No info yet] |
| 2016-08-24 | Unknown, on a sched. |
| 2016-06-15 | Up in the air, as what to air, for short |
| 2016-06-02 | Sched. uncertainty |
| 2015-07-28 | Not yet posted, on a sked |
| 2015-06-24 | Not yet available at press time, for short |
| 2015-03-21 | Alternative to "?" in some listings |
| 2014-12-07 | Scheduling placeholder |
| 2014-05-26 | TV schedule abbr. |
| 2014-05-01 | Not yet on the sked |
| 2012-11-07 | Not yet filled: Abbr. |
| 2012-05-08 | Program abbr. |
| 2012-02-19 | Not yet decided: Abbr. |
| 2011-12-31 | Sched. letters |
| 2011-12-29 | Schedule abbr. |
| 2011-11-20 | "Details forthcoming": Abbr. |
| 2011-05-07 | Up in the air, for short |
| 2011-02-17 | Not yet determined: Abbr. |
| 2010-12-21 | Awaiting scheduling, initially |
| 2010-11-04 | Undecided: Abbr. |
| 2010-08-18 | TV schedule abbr. |
| 2009-08-23 | TV schedule abbr. |
| 2009-07-19 | "More later," on a sched. |
| 2009-04-25 | Itinerary abbr. |
| 2009-02-19 | ?, on a sched. |
| 2008-11-08 | Listings abbr. |
| 2008-10-20 | Not yet decided, on a sched. |
| 2007-07-09 | Abbr. in TV listings |
| 2007-06-07 | Program guide abbr. |
| 2007-01-05 | TV schedule letters |
| 2005-12-04 | Not yet decided: Abbr. |
| 2005-08-22 | Scheduling abbr. |
| 2005-07-17 | Not yet scheduled, in schedules |
| 2005-06-02 | Schedule abbr. |
| 2005-05-02 | Sched. "question mark" |
| 2004-12-12 | Course list abbr. |
| 2004-09-05 | TV schedule inits. |
| 2004-02-15 | TV schedule abbr. |
| 2003-02-26 | TV sked abbr. |
| 2000-05-13 | Course list abbr. |
| 1999-10-17 | As yet unscheduled: Abbr. |
| 1998-07-12 | As yet unscheduled: Abbr. |
| 1995-05-28 | TV schedule letters |