OAL

OAL stands for:

Object Action Language , text-based notation for UML Actions
Observatório Astronómico de Lisboa (German Observatory Lisbon ), astronomical observatory of Lisbon
Open Audio License , music rights license from the Electronic Frontier Foundation
Ordre des Arts et des Lettres (German "Order of the Arts and Literature"), French order
Overall Length , in the technical (construction area) for the total length
Olympic Air (ICAO code), Greek airline
Cacoal Airport (IATA) Airport Cacoal , Rondônia , Brazil
The East Asian Lloyd (德文新报), German-language newspaper in Shanghai, China, founded in 1889

OAL as a distinguishing mark on license plates: