I remember building a "Sol-20" from a kit in 1977 or 78. It had an Intel 8080 processor, and I hooked it up to either a green, ot an amber monochrome monitor that I salvaged from a successful "dumpster dive" in an office park. I had to switch between the two monitors, because they had severe burn-in on localized areas of the phosphors, each on different parts of the screen!)
I also remember about 20 years ago when I worked at (yes, I'm admitting it) "Rat Shack", we had to run a daily report via modem with Tandy in Texas, using a modem with a Baud rate of 300 bps! It had a manual switch to capture the phone line. (Sometimes it didn't properly release the phone line, or grabbed it on its own at random times, which I remember leading to more than one late night call from the Police because the Alarm Company got a signal that there was "trouble" on the phone line, requiring me to drive back to the store and manually reset the modem and the alarm. A royal pain.)
The store's computer (a TRS-80 Model 100??) used an external hard drive (a Winchester, I believe) that was the size of a full size CPU tower on it's side . It sounded like an old time Victrola with ceramic grinding sounds emanating from it while it was revving up to speed. And it had a massive storage capacity - 10 MEGABYTES !!!
Ah, the good old days.....