
An absolute term indicating a film's sensitivity to light. The letters stands for American Standards Association . The term as been replaced by ISO standing for International Standards Organization.
Found on
http://www.rodsmith.org.uk/photographic%20glossary/rods%20photographic%20gl

This is the sensitivity to light of a particular type of film. It is the specific number used to measure Film Speed. It is the same as I.E. and I.S.O. A.S.A. stands for American Standards Association, the organization that standardized the scale of measurement of film speed.
Found on
https://www.encyclo.co.uk/local/21112
No exact match found.