Workshop tools include:
Lisa Pascal was developed by Silicon Valley Software, who also sold it and a Pascal based operating system to Corvus for the Corvus Concept. SVS also sold a FORTRAN compiler into the early Unisoft Unix market.
If you do a hex dump of the Lisa Workshop disc 5, you'll find a 1981 SVS copyright at location 38bb0
Source: Al Kossow - post to classiccmp.org mailing list.[LisaFAQ] > [Lisa Software] (Comment on this answer)