AB

AB or Ab may stand for:

• Ab or Av, a month in the Hebrew calendar
• Ab, the Egyptian concept of the heart-soul
• Abkhazian language (ISO 639, ab)
• Aktiebolag (AB), Swedish for "corporation"
• Alberta, a Canadian province
• AB is a human blood type.
• Abdominal muscles
• Bachelor of Arts, an academic degree
• In mathematics, the Category of abelian groups, Ab.
• Akron Barberton Cluster Railway (AAR reporting mark AB)
• the IATA code for Air Berlin