It's funny you should mention avionics. Because I remember writing test scripts for one such system merely because I had "basic" on my resume. I had no idea what a FADEC was. Granted, we ended up doing these many thousand line copy-paste jobs (i.e. figure out which of a few test functions to call for each of about 10,000 inputs)

I ended up learning VBScript for that job, automating some of the testing, and turning the scripting tool they gave us into a music player.