The .spt file extension is related to the Spitbol language source code files.
SPT file extension - Spitbol language source code file
What is spt file? How to open spt files?
File type specification:
The SPT file extension is associated with the SPITBOL (Speedy Implementation of SNOBOL) programming language originally used for IBM System/360 and System/370 programming. The .spt file stores source code written in Spitbol.