I'm making a sort of research of the different electronics and brake systems used by Formula One teams in the the mid-1990s. As we all know, nowadays these systems are pretty much delivered by a sole supplier, but it surely hasn't been that way in the past.
I'm interested in, let's say, the period of time between 1993 and 1997. So far I've found out:
Magneti Marelli provided electronic systems for at least Benetton, Ferrari, Sauber and Williams, while McLaren used TAG electronics.
At least Williams used brake discs and calipers by AP Racing. Ferrari had Brembo brake systems.
And that's pretty much all I've managed to find out. As you might think, that information's not just lying around on the Internet, so I was hoping someone here would have more first-hand (or even second-hand

For clarification: By electronic systems I mean things like ignition and such. I'm not that interested in systems operating the gearbox, the steering wheel etc. By brake systems I simply mean brake calipers (if provided by another supplier than the discs).