FST

FST may refer to:

Technology:

• Fast Sine Transform, a mathematical transformation similar to the Fast Fourier Transform
• File Streaming Technology, Alesis' proprietary file format for the HD24 digital multitrack
• Finite state transducer, also known as a Mealy machine, a type of Finite state machine
• Floating Slab Track, railway building tool

Media:

• Finlands Svenska Television (FST5), the Swedish language department of the Finnish Broadcasting Company

Biology:

• Follistatin, a protein, an antagonist of activin

Other:

• Fixation index (F_ST), a measure of population differentiation
• Field Sobriety Test
• Faces-Symbol-Test, a cognitive screening test for the assessment of memory and attention deficits
• Fire Support Team, a sub-unit of the Royal Artillery
• Fermanagh and South Tyrone, an area of Northern Ireland
• Financial Secretary to the Treasury, a junior Ministerial position within HM Treasury
• Franciscan School of Theology
• Fluffy Spider Technologies, a computer software company
• Forest Oil Corporation, having the NYSE symbol FST