English abbreviations from oat to ob
- OAT (Outside air temperature)
- OATA (Ontario Art Therapy Association)
- OATCERT (Online Accelerated Teacher Certification)
- OATS (Olefin Alkylation of Thiophenic Sulfur)
- OATT (Open Access Transmission Tariff (US))
- OATUU (Organization of African Trade Union Unity)
- OAU (Organization of African Unity)
- OAuth (Open Authentication)
- OAV (Object Attribute Value)
- OAW (Office Activation Wizard)
- OAX (Xoxocotlán International Airport)
- OAY (Outstanding Airman of the Year)
- OAYA (Outstanding Airman of the Year Award)
- OAZ (Ones And Zeros)
- ob (obiit (Latin, " he died"))
- Ob. (Obiit ("Died"))