The first “desktop computer” I used was a Wang in the mid to late 1970’s. It had about an 8” green screen with tiny dots that made up the letters and numbers showing on it. They were easiest to see in dim light, so we had to remove half the lights in the room that it was kept in. It did not have a hard drive or floppy discs. It has an ordinary cassette tape for storing programs. It had 8K of memory (which was a costly upgrade from the 4K standard). With a pinwheel printer, it cost nearly $20,000. Of course, we had to write our own programs in Fortran.
“It had about an 8” green screen with tiny dots that made up the letters and numbers showing on it. They were easiest to see in dim light, so we had to remove half the lights in the room that it was kept in. “
I had one of those. I found out that you could reverse the pixels and get black letters on a bright green screen and it was easier to read. People would wonder what command I used to do that, but I never told them.