Here's a list of things I've worked on in the past.
I'll add to this as I remember them and have time to add to it.
In college, my senior project was a spoken word recognizer. It was supposed to recognize spoken words for each of ten numbers: zero through 9. It didn't work. It was programmed on an Altair 8800
(another post about the Altair 8800 computer). The professor who taught the class was the only one who could pull the paper tape through the paper tape reader (it was pulled manually) without getting an error.
Used punchcards for a fortran class
I then found out that if I asked a teaching assistant for a class, I could be able to work on a teletype
When he had the class with me (a one-on-one) it malfunctioned and paper started shooting out the back! Years later, when I was working in the "real world" I bought one from the local Morris County College when they were getting rid of them. I used it with compuserve (an early online community before the internet and facebook). The whole house shook when I used it! It had an acoustic coupler that was used over the phone line.
At home, I worked on hobby computers
While in college, I bought an 8080 kit. I never had a chance to build it, because I quickly sold it to buy a Kim-1 computer and started a company to sell software for it
I traded it in for a RCA VIP
And then later for an Atari 400 and then traded that for an Atari 800 (which I still have)
Later I bought an IBM PC compatible computer which costed in excess of $1500 - I have never bought a computer as expensive of that since then!
At work, I was developing microprocessor based solutions for a military subcontractor called Conrac (later Smith industries) for the F/A-18 fighter/attack jet and the AV8B Harrier Jump-Jet on a very large intel development system (one of the following, but I'm not certain which one: MDS-80, or MDS-800) for the intel 8080 microprocessor. At the time I had either the RCA-VIP, or the Atari 400 or 800 and would tell folks at work that while I was taking months to develop programming code for these microprocessors at work, I had more powerful computers at home!
At one point, while out at a local computer store looking at some add-on parts, I saw an advertisement to work for a company. I interviewed and got the job to work on video games for the Atari VCS: http://oldcomputers.net/atari-vcs.html
(see my video games page for more info about the games I worked on)
While there, I worked on toys too, like games for the Etch-a-Sketch Animator 2000. Colleagues of mine worked on the Fisher-Price PXL2000 video camera for children and the video camera inside the Lionel Train - I think called "Railscope")
I worked on a multiyear research project for a Vettest Veterinarian Blood Chemistry Analyzer (which is still being used in 2017 and is a 3.2 Billion dollar product family) for which I was awarded 3 patents (see my patent page for more info about patents I have).
I left there to work for a company where we made even more video games (see my "video games" page for more about that)
I'll try to add more to this later.