| STF | Saskatchewan Teachers' Federation 
| Others |
| STF | Saskatchewan Teachers' Federation (Canada)
| Others |
| STF | Sastha Tamil Foundation
| Others |
| STF | Save the Tiger Fund
| Others |
| STF | Save To File
| Others |
| STF | Scale To Fit
| Others |
| STF | Scattering Transfer Function
| Others |
| STF | Scheduled Transfer Facility
| Others |
| STF | School Travel Forum
| Others |
| STF | Screen Transfer Function
| Others |
| STF | See the forest
| Others |
| STF | Self Test Function
| Others |
| STF | Setup File
| Others |
| STF | Short Training Field
| Others |
| STF | ShrinkToFit Compressed file archive
| Others |
| STF | Sid The Fly
| Others |
| STF | Silence The Fall
| Others |
| STF | Silence The Feedback
| Others |
| STF | Singapore Taekwondo Federation
| Others |
| STF | Single Tuned Frequency
| Others |
| STF | Single Tuning Frequency
| Others |
| STF | Slayers Task Force
| Others |
| STF | Sleuth Testing Framework
| Others |
| STF | Slip, Trip, Fall
| Others |
| STF | Slough Taxi Federation
| Others |
| STF | Smartphone Test Farm
| Others |
| STF | Smooth Trans Focus
| Others |
| STF | Smooth Transition Focus
| Others |
| STF | Software Test Facility
| Others |
| STF | Some Tests Failed
| Others |
| STF | Source Time Function
| Others |
| STF | South Tampa Fellowship
| Others |
| STF | Space Time Friction
| Others |
| STF | Space-Time-Frequency
| Others |
| STF | Special Task Force
| Military, Police |
| STF | Special Teaching Facility
| Others |
| STF | Special Terrorist Forces
| Others |
| STF | Specialized Treatment Facility
| Others |
| STF | Spin Test Facility (see DSTF)
| Others |
| STF | Spinning Toe Face
| Others |
| STF | Spokane Team Fortress
| Others |
| STF | Spread tow fabric
| Others |
| STF | Standard Transaction Format
| Others |
| STF | Standard Transmission Format
| Others |
| STF | STeering Fluid
| Others |
| STF | Stephen Island Airport
| Others |
| STF | Stephen Island, Queensland, Australia
| Others |
| STF | Stepover Toehold Facelock
| Others |
| STF | Stochastic Thin Films
| Others |
| STF | Storm The Front
| Others |
| STF | Straight Talk Foundation
| Others |
| STF | Street Tech Formula
| Others |
| STF | Street Touring Front
| Others |
| STF | Structural Fatigue Test
| Others |
| STF | Student Tech Fee
| Others |
| STF | Student Technology Fee
| Others |
| STF | Student Travel Fellowships
| Others |
| STF | Submission Through Fear
| Others |
| STF | Submission To Fear
| Others |
| STF | Summary Tape File
| Others |
| STF | Summer Teaching Fellowship
| Others |
| STF | Sunny Tang Family
| Others |
| STF | Super Tight Fit
| Others |
| STF | Super Twin Fan
| Others |
| STF | SuperForm Tax Forms
| Others |
| STF | Supremo Tribunal Federal
| Others |
| STF | Surgical Training Facility
| Others |
| STF | Sustainability and transformation funding
| Others |
| STF | Sustainable Transport Forum
| Others |
| STF | Swedish Dental Association
| Others |
| STF | Symmetric Trace Free
| Others |
| STF | Systematic Transformation Facility
| Others |
| STF | Systems Technology Forum
| Others |