Encyclopedias, Almanacs, Transcripts, and Maps
- Absaroka
- Absheron
- absolute differential calculus
- absolute monarchy
- absolute temperature scale
- Abu al-Abbas as-Saffah
- Abu al-Ala al-Maarri
- Abu al-Faraj
- Abu al-Faraj Ali of Esfahan
- Abu al-Fida
- Abu Muslim
- Abu Qir
- Abu Said ibn Abi al-Khair
- Abu Tammam Habib ibn Aus
- Abu'l Hasan al-Uqlidisi
- Abubakar, Abdulsalam Alhaji
- Abubakar, Atiku
- Abubus
- Abukir
- Abulcasis