Help identifying vintage escrap cards and boards

Radio Shack once sold all sorts of kits, as did Heathkit. All types of electronics type kits. I had a little metal detector from Radio Shack in the mid 60s. By the 70s they had the little Tandy Radio Shack (TRS) computer beginnings
If you've ever seen old comic book or old magazine advertisements, they used to be highly concentrated near the back, advertising more stuff than I can recall. My interest was mostly stamps and coins and they'd advertise them as an assortment. They'd have little photographs of all the better stuff in the package, maybe you'd get one in the lot, plus a bunch of other crapola
Radio shacks ads were of transistor boards, and their photographs were much the same, showing oodles of boards filled with transistors and stuff. Kinda like little grab bags full of stuff. Guys from school would by them and talk about how they fixed a TV or radio etc with a particular transistor they found on one of the boards or something like that