Historical clue formulations

• With 54-Across, math that underpins computer logic — 2026-08-05
• Kind of logic in which all values are either true or false — 2017-12-11
• Kind of algebra — 2014-05-04
• Like some Internet searches — 2011-09-30
• Kind of algebra — 2005-03-19
• Like some algebra — 2001-09-23
• Like some computer searches — 2001-06-01
• Kind of algebra — 1994-07-17