I'm another awkward bugger like Mucks
I really don't know what to answer, I mostly work with Sound Systems. Be it maintenance, support, installation, sales or whatever, so what would that be?
I don't sell or repair computers but I have installed CCTV 'suites' in colleges where two to four cameras & microphones record to hard disk. I've built & supplied the computer to do the job there on several occasions, I usually use the Matrox bundle with the 'flying' interface.
I do me own books. No managers here, if any of the the people I use to do work for me don't shape up, I don't use them again, simple as that.
Engineering/Science? Possibly not, but sometimes some of the things I have to do within buildings, particularly when laying cable, it feels like engineering.
I am definitely not a student, last course I done was twenty years ago, Electronics, a one year course followed two years later by a year of day release. I vowed then that's the last bit of recognised learning leading to a qualification I'm ever going to take.
So, I dunno, what would that make me?
Hmmm..... (drums fingers on desk and thinks.....)
OK, I'll go with service/support as the majority of calls I get are to fix things.