I did numerous projects over several years in Silicon Valley at Intel, Sematech and AMD with a product called Streamline made by project lead Bayliss Automation.
Streamline made making interfaces to SECS II compatible equipment much easier than doing so with raw C code. These interfaces were to etchers, furnaces, wet stations, ion implanters and deposition systems.
The work of hooking up a new piece of gear was in characterizing how well it conformed to the SECS II specification and then implementing the kind of control and monitoring desired by the process engineers. The languagesĀ I used were C and Streamline.