I don't know how serious of a name collision this is, but Index is the name of a company that has a very long history[0] of making machining tools. Today they mainly make CNC lathes and mills[1].

I own a post-war era Index-25 automatic lathe and it's a marvel of mechanical engineering. They can make a modern general purpose CNC lathe look really slow by comparison. Here's some pictures[2] of a similar but younger machine that I found out there.

[0]: https://www.index-traub.com/en/company/about-us/100-years-in...

[1]: https://www.index-traub.com/en/

[2]: https://www.drehautomaten-pyka.de/Reparatur/reparatur.html