What does FIX stand for?

Comfort Systems USA - NYSE symbol (SPSG)

Factor IX - Hematology

Fault Isolater and Exercizer - Honeywell (NITA)

Federal Inter-agency eXchange

Federal Internet Exchange (TNIG)

Ferndale Internet Experiment - Computer science

Financial Information Exchange (GART)

Firing in Extension - Missiles

Fixture

Sea Force IX Inc., Palmetto, FL - Manufacturer code for watercraft hull identification number (USCG)

Fixation (SAUS)