This is the first in what I expect to be a series of posts that highlight subject I/We are thinking of at the museum. In the museum, one of our talking points- a "sub tour" in the museum, highlights concepts of interconnects, from back planes to buses. Bus slots are best represented currently in the micro era exhibits on S-100, Apple II, and the PC. One idea that is probably coming is to have a whole slew of labeled add-in boards on the wall to show how significant the ability and the practice of upgrading a microcomputer was. Slots were important to make these machines versatile and created entire sub industries around each machine that had slots. I'm less versed in the slot systems of the minicomputers; I imagine a certain amount of this dynamic occurred there too. I'd like to share a bit of lore on the IBM PC bus, as this, I find, is lesser known in the hobby. The father of the IBM PC ISA bus is Lou Eggebrecht, and its a great story. He wrote the book, literally, on the IBM PC ISA Bus. https://archive.org/details/interfacingtoibm00egge I just bought a copy. We'll have this in the museum. After the PC was launched, a situation happened between him and IBM and they "parted ways". A short interpretation might go along the lines that IBM perceived Mr. Eggebrecht was capitalizing too much personally on the ISA bus. My reference is "Blue Magic - The People, Power and Politics Behind the IBM Personal Computer" by James Chposky and Ted Leonsis. I don't know his whole career after IBM. I do know he went on to be an influential person at Commodore, ICS and Broadcom. Here's a period piece on him at Commodore (https://amr.abime.net/review_51617) He seemed to follow along with moves of Mr. Hock Tan. Hock Tan is the CEO that presided at Commodore at the end of line, selling off the assets I think. Hock Tan then came to ICS (Integrated Circuit Systems), a Valley Forge-based fabless mixed signal semiconductor designer with products revolving around phase-locked loops. Of interest to most of our hobby--- ICS was started by Ex-MOS process engineer Ed Arnold in the late 1970s. ICS had a number of ex-Commodore personnel on staff. Mr. Eggebrecht I believe was on the board of ICS for while, and this is where I had a chance to meet him in the late 1990s. At the time I only knew he had some involvement with the IBM PC. He was very likeable; humble, warm, and gracious. Mr. Eggebrecht was ideal to have on the board at ICS - who's chief products were the timing generators for the Intel processors and chipsets at the time. Hock Tan went on to IDT (as did I) when he sold ICS to IDT and then to Avago (I did not). Hock Tan orchestrated the huge merger of Avago and Broadcom. I mention this, because, not surprisingly, Lou Eggebrecht served on the board of Broadcom for some time too. He would be a great speaker at a VCF! :-O I hope his oral history gets taken too.