Right, ignore my specs, as they need updating.
My current PCD (Personal Calculating Device) is actually a classic from 1888 - yes, the Wild West era. There's not many of those left nowadays, I tell you.
So, the main specs are a 3-bit CPU (Central Procedure Unit) running at 50-80Hz or so (not all that stable, depending on temperature), operating system is a really early version of Micros Windowing lol (version 0.001 I believe) 1.852 kilobyte "hard disc" - I think they actually made them out of shellac covered in magnetic-impregnated paper back then, running at 200rpm and some onboard graphics contraption I've never been able to identify. The PSU has to have a special inverter before it to work on modern British 240V mains electricity and was quite hard to source.
Browsing the modern internet with the built-in IEU (International Exploration Utensil) v.0001 is a bit of a challenge, but I get by just about.
The valves do take a while to warm up, especially those in the CPU I dare say. After I switch it on (crank handle on PSU getting a bit stiff now, with old age) I need to let it sit for at least 10 minutes. On the plus side, it warms the room up beautifully in the winter!
So, why do I use such an old PC? Sorry, PCD. Well, it's like people who restore classic cars and then drive around in them. Same sense of satisfaction.