JScript is Microsoft's JavaScript that can run server side. I guess it was a thing in the late 90s and early 00s. The "Click Commerce" web CMS/framework was largely written in it. They pivoted from commerce to medical research, and the software is still being used by dozens of institutions.
Ask HN: What is the most niche programming language that is still written?
11–14 of 14 posts
Re: Ask HN: What is the most niche programming language that is still written?
#12Z80 assembly.
Re: Ask HN: What is the most niche programming language that is still written?
#13Pike (https://pike.lysator.liu.se)
Re: Ask HN: What is the most niche programming language that is still written?
#14Rexx at IBM, but I guess there are several such internal langs used in similar obscure companies.