STX may refer to: Businesses Seagate Technology, a hard drive manufacturer with stock symbol STX STX (sports manufacturer), a sports manufacturer based in Baltimore, Maryland STX Corporation (System Technology Excellence), a Korea-based holding company STX Entertainment, a Los Angeles-based motion picture production and distribution company STX Europe, a ship builder Chemistry Saxitoxin, a neurotoxin found in marine dinoflagellates Shiga toxin Syntaxin, a membrane integrated Q-SNARE protein participating in exocytosis Computing A secure private telephone network used by London Stock Exchange affiliated firms and professionals PASTI raw disk image format for the Atari ST Start of Text, a control code in the C0 control code set Socket Technology EXtended, the Mini-STX computer form factor Streaming Transformations for XML, an XML transformation language Structured text, a plaintext markup language Places Henry E. Rohlsen Airport (IATA code: STX), an airport on St. Croix, U.S. Virgin Islands South Texas St Croix, U.S. Virgin Islands St Cross College, Oxford Other uses Case STX Steiger, a tractorline built by Case IH Star Trek: Nemesis, the 10th film in the Star Trek film franchise (Star Trek X) Almen studentereksamen, an examination used in Denmark for the secondary school called gymnasium