Imagine a computer that's as big as a refrigerator, but not as useful for storing your favorite snacks. The IBM 5100 was a behemoth of a machine, with 1 MB of RAM and a 16 KB hard drive that would make your eyes roll into the back of your head.
Released in 1975, this behemoth of a system was the first to feature a full keyboard and monitor. It was the epitome of 70s tech, and we're not even being facetious.
Want to see what's under the hood? Click here to take a peek at the IBM 5100's innards.
Or, if you're feeling adventurous, click here to play some of the most basic text-based games ever invented.