File type: ESPL Programming
The SPT file extension is the source code written using the ESPL language. This is used for developing programs with research or scientific applications. The language ESPL used to create the SPT files is capable of encrypting the ESPL programming files.
This language allows developers to sell and distribute their applications without revealing the proprietary formulas and source codes to their customers. TIt often come with a subscription with expiration dates. This means that the SPT files stop working after the expiration date.