The msp file extension is related to the MaxScript used to store HTML code for server-side processing to be interpreted by the MaxScript interpreter.
MSP file extension - Max Script Page
What is msp file? How to open msp files?
File type specification:
The msp file extension is associated with MaxScript. Plain ASCII file containing HTML code for server-side processing to be interpreted by the MaxScript interpreter.
MaxScript is a web server extension used in products like DBFree and DBMax (by MAXSIS): its purpouse is to parse a web page in search of xBase/Clipper commands to be interpreted on server and to send the results to web browser.
MaxScript offers direct access to data sources on server (DBF tables or ODBC connections) to provide live-contents to the web pages and works with Apache, Xitami and IIS6/7.