Back in my primary school days (circa early 1980s), my father bought a Sharp PC 1500 – the then cutting edge “PC” looks like a “powerful” calculator and could handle a rudimentary version of basic. I remember after setting some simple formulas, I had the PC solving some of my math assignments on area and perimeter. The PC 1500 could also be slotted onto a printer dock and output data onto a roll of paper (like a calculator with a printer).
Searching the web, I found it had a 8-bit CMOS processor and a whopping 3.5K RAM!!!