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This page serves as a centralized base, covering all things STK! . STK (Systems Tool Kit) is a physics-based simulation and modeling software used to visualize complex real-world scenarios.
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If you're just looking for definitions of a term you found somewhere on STK, check out the Dictionary (first subcategorylink below). Otherwise, if you want some guidance on how to do a small project, check out the Mini Tutorials (second subcategorylink below).
STK Dictionary
STK Mini Tutorials
Best of luck!