When I worked at Apparat around 1981, we used a lot of *male* IDC edge card
connectors. I've almost never seen any since, and I couldn't remember the
name of the vendor. I just found out that it was Kel-Am, but the internet
knows almost nothing about them.
Here's an example:
That photo doesn't show the Kel-Am logo, which is just a stylized "KEL-AM".
There are some eBay auctions of the corresponding female connector (which
other vendors did make), some of which show the logo.
I wonder what happened to Kel-Am. Maybe they were acquired, maybe they went
under. It would be nice to find a copy of their catalog.
Speaking of which, it would also be nice to see some Robinson Nugent
connector catalogs from the late 1970s and early 1980s. I am especially
interested in seeing specs for their bottom-entry square-pin receptacles,
which I think _might_ be the ones used on Apple /// memory boards.