Historical clue formulations

• Suffix with linguist — 2019-01-27
• Suffix with 42-Down — 2011-11-26
• Suffix with robot — 2011-08-14
• Suffix with robot — 2010-10-03
• Suffix with robot — 2010-05-06
• Suffix with electron — 2008-08-17
• Suffix with robot — 2006-03-11
• Suffix with electron — 1999-01-06