Ancient Computing
In the dawn of time, our ancestors were stuck with boulders and papyrus. They tried to do math with sticks and rocks, but it was a real pain in the... well, you see.
We've got some of the most basic, yet somehow functional, computers ever created. Like the Abacus for counting and Roman Calculator for, well, more complicated math.
And let's not forget the Roman Calculator's parts - they were made of real metal and stuff!