If I remember correctly, and I’m getting old so I don’t remember correctly a lot, Radio Shack hit the market when CB Radios were the craze. They stocked all brands and accessories. That may have been the “radio” in Radio Shack.
Here is a site on the internet where you can look at all the old radio shack catalogs. Back when there catalogs(which they no longer publish) were like a wishlist of dreams. Back when radio shack was cool!
http://www.radioshackcatalogs.com/