WSTF (FM), a radio station (91.5 FM) licensed to serve Andalusia, Alabama, United States
Web Services Test Forum - provides an interoperability test framework for the Web Service community
White Sands Test Facility - a NASA rocket engine test facility located in the foothills of the Organ Mountains, eleven miles east of Las Cruces, New Mexico
Westaff - a staffing company based primarily out of Walnut Creek, California, United States and traded publicly on the NASDAQ market, using the stock symbol WSTF