Started in radio communications, then consumer electronics, and moved to industrial electronics and computing when cpm was more common than dos. Ended doing datacentre systems, servers and storage at expert level.
Cromemco, Systems Group 2800, CRDS, Osbourne, DEC Rainbow, Sirius, Televideo, IBM, BBC B (3), Master, 6502 Copro & Hdd, Sym-1 & KTM2, SWTPC PR-40 Printer, Sun, Olivetti M10, lots of S100 cards and tons of old floppies, tapes & drives, disks and other parts.