It's interesting but I remember seeing Radio Shack TRS80 Model 100 Laptop at the RadioShack store and wanting it, but mom said no. I had to settle for the Color Computer, since it was somewhat cheaper. People usually remember IBM PC but don't realize that there were many other brands out there. In my high school days, we had access to Apple I & IIs as well as TRS80 Model III machines. TRS80 machines came with DOS, BASIC & Editor Assembler, which were taught at our high school digital class.

TRS80 100 https://www.oldcomputers.net/trs100.html

TRS80 Model III https://www.oldcomputers.net/trs80iii.html

COCO https://www.oldcomputers.net/coco.html