One that I would have liked to see under the hardware section is thermal paper fax machines. I still remember working in my parents office as the "gopher" when I was in grade school. One of my jobs was to make photocopies of all the faxes so that they could still be read after the thermal paper faded.
In this book (http://en.wikipedia.org/wiki/The_Cuckoo%27s_Egg_(book)), Stoll talks about hooking up unix terminals to daisy wheel printers so he can review input later on.
I used to have a daisy-wheel back in the day, and the thing sounded like a machine-gun. I can't say I miss it (although the print quality was nice.)
If computer games are considered in this category of '25 legendary products', then a lot of them would have been there. Dave, Prince, Doom and Wolfenstein for sure. And people haven't stopped loving them, a lot still play it. Wolfenstein is now on iPhone also. Anyone's got any idea abt it's sales?
I'm surprised they didn't mention Voodoo. I still have a few of their graphics cards lying around.