AST

AST is a three-letter abbreviation that stands for a number of different things.

• In medicine it refers to the enzyme aspartate transaminase.
• In computer science it means abstract syntax tree.
• AST Research, Inc manufactured personal computers between 1980 and 1999. The name was then owned by AST Computers, LLC.
• In aviation, it means Advanced Supersonic Transport.
• AST is an abbreviation for the time zone Atlantic Standard Time.