FSA files are genemapping files that are used by Applied Biosystems systems. Applied Biosystems are a research business focusing on basic research, commercial research (pharmaceutical and biotechnology) and standardized testing, including forensic human identification, paternity testing and food testing.

This file format was created by Applied Biosystems for data storage and anaylysis. Tools to convert this format to a more common format can be found on the Applied Biosystems' website (See links below).