When I was in 8th grade, my school had an IMSAI 8080
http://oldcomputers.net/imsai8080.html that had 8K of RAM, ran BASIC, and had 2 TTY's with paper tape punch/readers. When it crashed, the teacher had to reload the OS with a paper tape that took about 30-45 mins to load.
Then, in high school, we had an Interdata something or other. It had 36K, 2 8.5 inch floppy drives, 7 TTY's and 3 CRTs, ran BASIC and had a Centronix dot matrix printer, and man, that printer was fast. The TTY's had paper tape punch/readers, so you could punch your program and
take it home with you! To boot the Interdata, you had to enter a series of codes into an octal keypad on the front panel, the last of which caused the read/write head to move into position on the floppy drive, with a loud clunk. I always that that was really cool!
The first computer I actually owned was an ATARI 800XL that when you entered "print SQRT(4)," it said 1.9. I don't recall the exact details, but it was some goofy bug in the built-in BASIC. In those days, there were magazines that had programs in them that you entered into your computer by keying thousands of (decimal) machine codes into some little BASIC program. I keyed in a word processing program that worked pretty darn well--it got me through my first college career--for the cost of a $2.00 magazine.