Tac2 (the Traansvaal Amateur Computer Club) was a group of nerds and geeks that met in the basement of Senate House at the University of the Witwatersrand, Johannesburg, South Africa. I served as Editor of their newsletter for several years and also as Chairman for a good many more.
The club, as I recall, started out with folk who built their own Motorola 6800 computers from kits put out by Southwest Technical Products Corporation. Many of us also soldered together Sinclair ZX80’s. Then the tide turned against hardware and our soldering irons towards software and keyboards: We started buying ready built machines like the Sinclair ZX81, Commodore PET, Radio Shack’s TRS80 and the Apple II. The software revolution had begun and the Apple took a big lead eventually to be overtaken, not by the latecomer IBM PC itself, but by the generic PC.