Historical clue formulations

• Mi, in a C major scale — 2022-01-16
• Virtual sticky — 2019-10-27
• Cybermemo — 2019-10-17
• Digital message — 2019-07-07
• Line online — 2017-03-18
• Cybermemo — 2014-07-15
• Modern message — 2014-03-28
• Online line — 2014-02-18
• Cybermemo — 2013-10-11
• Quick online message — 2012-12-20
• Online memo — 2012-03-27
• Short online message — 2011-01-06
• Cybermemo — 2010-05-19
• Online message — 2009-05-29
• Online memo — 2008-01-25
• Internet message — 2006-10-15
• Brief online message — 2006-09-10
• Short Internet message — 2005-04-17
• Short message via AOL, say — 2004-09-11
• Quick Internet message — 2003-10-12
• Short Internet message — 2002-12-20
• Certain govt. issue — 1998-08-29