I am a college professor. I teach electrical engineering technology majors mostly (electrical circuit theory, semiconductors, microprocessors/microcontrollers). I also teach some computer science (Python) and science/physics for non-majors (I developed a natural science elective called Science of Sound- lots of fun there).
I also write a lot (two editions of a linear semiconductors text, a bunch of lab manuals, and I don't know how many articles for electronics/computer/music magazines. Many years ago I wrote a short-lived column for Modern Drummer on electronic drums. This was when MIDI was new. I think it was around 1987 or so.
Then there's my software company, dissidents
. Audio analysis and editing software mostly.
And sometimes I draw cartoons. Like my avatar. That's been around for decades.