| 2025-05-03 | Onetime union member: Abbr. |
| 2025-03-16 | Latvia, e.g., once: Abbr. |
| 2025-01-29 | Armenia, e.g., until 1991: Abbr. |
| 2025-01-25 | Old atlas inits. |
| 2024-12-23 | Latvia or Estonia, pre-1991: Abbr. |
| 2024-12-01 | One of 15 boycotting the 1984 Summer Olympics: Abbr. |
| 2023-05-03 | Georgia, for most of the 20th century, in brief |
| 2022-07-23 | 20th-century map inits. |
| 2022-06-22 | Azerbaijan or Lithuania, once: Abbr. |
| 2022-05-05 | Kazakhstan, e.g., formerly: Abbr. |
| 2022-03-08 | Old atlas inits. |
| 2021-08-15 | Ukr. or Lith., formerly |
| 2021-07-11 | Tajikistan, e.g., once: Abbr. |
| 2021-02-23 | Map abbr. until 1991 |
| 2021-01-31 | Union member of the 20th century, for short |
| 2021-01-10 | Kirghizia or Byelorussia: Abbr. |
| 2020-10-11 | Ukr., e.g., once |
| 2020-06-28 | Ukr., e.g., once |
| 2020-01-15 | Lith., e.g., once |
| 2019-12-29 | Georgia, once: Abbr. |
| 2019-12-11 | Map abbr. before 1991 |
| 2019-09-27 | Abbr. in an old atlas |
| 2019-04-25 | Georgia, once: Abbr. |
| 2019-04-15 | Byelorussia, e.g.: Abbr. |
| 2019-01-20 | Georgia, once: Abbr. |
| 2018-06-08 | Abbr. on old Eurasian maps |
| 2018-06-03 | Cold War-era inits. |
| 2018-04-02 | Ukr., e.g., once |
| 2018-03-11 | Any of the Baltic states, once: Abbr. |
| 2017-11-11 | Old union member: Abbr. |
| 2017-05-02 | 70-Across, e.g., formerly: Abbr. |
| 2017-03-07 | Ukr., e.g., once |
| 2017-02-11 | Old map abbr. |
| 2016-10-09 | Cold War land: Abbr. |
| 2016-09-21 | Kazakhstan, once: Abbr. |
| 2016-07-24 | Lat. or Lith., once |
| 2016-05-27 | Old atlas inits. |
| 2016-03-03 | Map abbr. before 1991 |
| 2016-02-02 | Old atlas inits. |
| 2016-01-08 | Old geographical inits. |
| 2015-11-17 | Any of the Baltic states, once: Abbr. |
| 2015-11-12 | Belarus, once: Abbr. |
| 2015-10-04 | Cold War-era territory: Abbr. |
| 2015-05-17 | Georgia, once: Abbr. |
| 2015-04-08 | One of a geog. 15, once |
| 2015-04-06 | Estonia, once: Abbr. |
| 2015-02-28 | State of old, briefly |
| 2015-02-08 | One of 15 until 1991: Abbr. |
| 2014-09-25 | 37-Across was the smallest one: Abbr. |
| 2014-08-21 | Byelorussian ___: Abbr. |
| 2014-07-19 | Letters in old atlases |
| 2014-03-25 | Moldavia, e.g.: Abbr. |
| 2014-02-16 | Old atlas initials |
| 2013-12-28 | Old map abbr. |
| 2013-09-25 | Pre-Yeltsin-era letters |
| 2013-09-18 | Belarus, until 1991: Abbr. |
| 2013-07-24 | Ukr., until 1991, e.g. |
| 2013-07-14 | Ukr., e.g., once |
| 2013-06-25 | Belarus, once: Abbr. |
| 2013-06-05 | Abbr. retired after Gorbachev's resignation |
| 2013-01-06 | Kazakhstan, once: Abbr. |
| 2012-11-21 | Byelorussia, e.g.: Abbr. |
| 2012-03-25 | Belarus, once: Abbr. |
| 2011-10-08 | Old political inits. |
| 2011-09-08 | Georgia was one once: Abbr. |
| 2011-08-24 | Georgia, once: Abbr. |
| 2011-07-17 | One of 15, once: Abbr. |
| 2011-03-30 | Ukr., e.g., until 1991 |
| 2011-03-27 | Old pol. entity |
| 2011-02-05 | Old atlas letters |
| 2011-01-09 | Div. of a former union |
| 2010-11-25 | Est., e.g., once |
| 2010-09-05 | Map abbr. before 1991 |
| 2010-04-10 | Bygone union member: Abbr. |
| 2010-03-14 | Lith., e.g., once |
| 2010-03-03 | Lith. or Est., once |
| 2010-01-18 | Belarus or Ukraine, once: Abbr. |
| 2009-11-27 | Former map inits. |
| 2009-08-13 | Map abbr. until 1991 |
| 2009-06-03 | Ukr., once, e.g. |
| 2009-01-24 | Old atlas inits. |
| 2008-11-18 | Ukraine, e.g., formerly: Abbr. |
| 2008-10-06 | Lithuania or Estonia, once: Abbr. |
| 2008-08-03 | Lat. or Lith., once |
| 2008-04-13 | Bygone map letters |
| 2008-03-08 | Est., once |
| 2007-11-15 | Ukraine was one: Abbr. |
| 2007-07-29 | Former pol. div. |
| 2007-07-19 | Ukr., once |
| 2007-02-16 | Former state: Abbr. |
| 2006-12-28 | Old geog. inits. |
| 2006-12-04 | Ukraine, e.g., once: Abbr. |
| 2006-10-22 | Old atlas abbr. |
| 2006-10-12 | Ukr., once, e.g. |
| 2006-08-25 | Old Black Sea borderer: Abbr. |
| 2006-07-12 | Estonia, e.g., once: Abbr. |
| 2006-04-06 | Russia, once: Abbr. |
| 2006-02-14 | Moldavia, e.g.: Abbr. |
| 2006-02-08 | Red letters? |
| 2006-01-06 | Old map abbr. |
| 2005-11-25 | Former empire abbr. |
| 2005-10-26 | Part of an empire up to 1991: Abbr. |
| 2005-06-14 | Lith., once |
| 2005-06-01 | Old map abbr. |
| 2005-05-22 | Bygone map letters |
| 2005-03-26 | Old union mem. |
| 2005-02-20 | Erstwhile bloc letters |
| 2005-02-13 | Former map inits. |
| 2004-05-09 | Bygone map inits. |
| 2004-03-20 | Old union member: Abbr. |
| 2004-03-05 | Bygone pol. unit |
| 2004-02-19 | Lith., once |
| 2004-01-19 | Ukr., once |
| 2003-12-02 | Outdated atlas abbr. |
| 2003-10-22 | Georgia, formerly: Abbr. |
| 2003-09-21 | Abbr. on old Asian maps |
| 2003-07-15 | Ukr. or Lith., once |
| 2003-06-29 | Old atlas letters |
| 2003-05-27 | Azer. or Ukr., once |
| 2003-05-04 | Inits. on bygone maps |
| 2003-02-04 | Ukr., once |
| 2003-01-16 | Div. of a former union |
| 2002-08-30 | Abbr. on old maps |
| 2002-07-31 | Lith., formerly |
| 2002-07-24 | Former Asian map abbr. |
| 2001-11-03 | Est., once |
| 2001-09-28 | Azer. or Lith., once |
| 2001-09-16 | Ukr., formerly |
| 2001-08-01 | Pre-Yeltsin abbr. |
| 2001-05-11 | Outdated atlas abbr. |
| 2000-05-03 | Estonia, once: Abbr. |
| 2000-03-18 | Georgia, e.g.: Abbr. |
| 1999-12-01 | Ukr., e.g., once |
| 1999-09-19 | Ukraine or Estonia, once: Abbr. |
| 1999-04-09 | Kazakhstan, once: Abbr. |
| 1999-04-07 | Old geog. initials |
| 1998-10-06 | Ukr., once |
| 1998-08-16 | Georgia was one: Abbr. |
| 1998-08-02 | Latvia, once: Abbr. |
| 1998-06-15 | Kazakhstan, once: Abbr. |
| 1998-03-18 | Abbr. on old Asian maps |
| 1998-03-02 | Armenia or Azerbaijan, once: Abbr. |
| 1998-01-17 | Abbr. on old maps |
| 1997-11-29 | One of 15, formerly: Abbr. |
| 1997-11-23 | Old geographical inits. |
| 1997-11-09 | Bygone geographical inits. |
| 1997-08-27 | Communist land, once: Abbr. |
| 1997-08-01 | Former Union member: Abbr. |
| 1997-06-05 | Old geographical inits. |
| 1997-01-19 | Obsolete geog. abbr. |
| 1996-12-15 | Georgia, once: Abbr. |
| 1996-09-01 | Georgia, once: Abbr. |
| 1996-02-29 | Old Communist state: Abbr. |
| 1996-02-17 | Defunct pol. entity |
| 1996-01-29 | Byelorussia, e.g.: Abbr. |
| 1996-01-13 | Moldavia, once: Abbr. |
| 1995-08-14 | Russ. or Ukr., once |
| 1995-02-21 | Ukr. or Russ., once |
| 1994-10-20 | Lith., formerly |
| 1994-10-09 | 50-Down, once: Abbr. |
| 1994-03-27 | Obsolete map abbr. |