Encyclopedias, Almanacs, Transcripts, and Maps
- Alfred Wegener Introduces the Concept of Continental Drift
- Alfridarya
- Algebraic Solution of Cubic and Quartic Equations
- Ali ibn Abbas al-Majusi
- Ali Rabban al-Tabari
- Alice Bailey
- Alice T. Schafer
- Alick Isaacs
- Alis de Tésieux (ca. sixteenth century C.E.)
- All Hallow's Eve
- Allan Charles Wilson
- Allan MacLeod Cormack
- Allan Rex Sandage
- Allat (or Ellat)
- Allegro, John (Marco) (1923-1988)
- Alleles
- Alleles
- Allen Baker
- Allen Newell
- Allen, James (1864-1912)