Long time ago in another century.... after electronics (paid crap, still does). I went automotive. Mechanic American cars, it grew to foreign, then exotic foreign, Then to wholesale aftermarket parts, to Muscle/Race cars to 4 wheeler trucks and vans. (All those mechanical tools). Oh yeah and car stereo's, alarms and other things like sunroofs. Sold most of that stuff (my stock) years ago.
Then went into x-ray machine assembly. Which was electrical and mechanical with hydraulics. (all the hardware, screws, bushings, etc). Then it turned into home remodeling & other wood working. Which I did all along the way to begin with.
The computer stuff just piled up from upgrading computers.
So it's all wood working tools, mechanical tools, electrical and electronic tools, and add in plumbing.
Now bookkeeping and accounting (on computers) but I still do everything else. (extra $$)