| STK | CRiSP Harvest File 
| Others |
| STK | HyperStudio Stack File
| Others |
| STK | MetaMorph Imaging System Discovery - 1 Software Stack file
| Others |
| STK | Personal Stock Monitor File
| Others |
| STK | Rail3D 2KD/2K3 Stock and Scenery Models file
| Others |
| STK | Satellite Tool Kit
| Others |
| STK | Savor The Kill
| Others |
| STK | Science and Technology Knowledge
| Others |
| STK | Sent To Kill
| Others |
| STK | Serine Threonine Kinase
| Others |
| STK | Shoot To Kill
| Others |
| STK | Short Tail Keyword
| Others |
| STK | Sim Tool Kit
| Others |
| STK | Single Tone Keying
| Others |
| STK | Situation Track display
| Others |
| STK | Sivil Toplum Kurulusu
| Others |
| STK | Sliding Tool and Knife
| Others |
| STK | Soap Tool Kit
| Others |
| STK | Solutions Through Knowledge
| Others |
| STK | Soluz Trudouogo Krest'ianstva (Russian - Union of Working Peasantry)
| Others |
| STK | Sound Tight Knot
| Others |
| STK | Speedcore Terror Kinetic
| Others |
| STK | Spoiled Trustfund Kids
| Others |
| STK | Spot Test Kit
| Others |
| STK | Stakes Race
| Others |
| STK | Standard Test Key
| Others |
| STK | Statistical Tool Kit
| Others |
| STK | Stay True Kid
| Others |
| STK | Steak
| Others |
| STK | Stephens Creek, Australia seismograph station
| Others |
| STK | Sterling, Colorado USA
| Others |
| STK | StichbanKeramik
| Others |
| STK | Stick
| Others |
| STK | Sticker Store Sticker file
| Others |
| STK | Stock
| Others |
| STK | Storage Tek
| Others |
| STK | Straight Truck
| Others |
| STK | Strake
| Others |
| STK | Stuck
| Others |
| STK | STurmKanone
| Others |
| STK | Super Tri Kids
| Others |
| STK | Svensk Teologisk Kvartalskript
| Others |
| STK | Synthesis ToolKit in C++
| Others |
| STK | Systems Tool Kit
| Others |
| STK# | Stock Number
| Others |