Proof #1: This graphing calculator

I haven’t needed to use a one of these for over 20 years, so this is pretty baffling to me. It’s a useable graphing calculator made by CommanderRedstone, capable of solving equations and plotting graphs, but in a Minecrafty way. That means each number or mathematical symbol you select, you get it in block form, and you place it within the calculator’s function, er, hole? Then you start graphing and watch as the game generates the result using blocks. It’s still Minecraft, so you can whack away at the equations until they crumble, and you can have clouds interfering with particularly wavy results. If you’re terrible at coming up with functions, the mod has a few to play around with. You can grab it from the description in the maker’s tutorial, here.

Proof #2: A functional PC

If you’re looking for a more general computing experience, Reddit user “joran213” built a PC with a built-in paint program, photos app, and more. It’s a chonky computing beast, with a keyboard laid out in a large grid in front of a giant screen that displays all the work. 750 command blocks power this, and it looks like it runs faster than my old ZX 128K. I eagerly await the Target: Renegade port.
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Proof #3: A PC building mod

What good does it do you to have the work done for you? In VM Machines, you have to build a tablet that you can use to access a passing satellite that acts as a shop. When you’ve connected to that, you order your case, a screen, some RAM, a graphics card, a CPU, a mobo, and a hard-drive. With all the items at hand, you then need to build it, including adding a real OS. Yeah, you need to go through the install process, too. When it’s all done, you’ll have a working PC on your in-game desk. Windows XP runs on it.
There are some smoke and mirrors. The processing itself runs within a virtual machine and displays it on the PC you’ve built, so you have to have that on your computer, but the PC will correspond to to the selected components you bought. Want it? It’s here.

And, yes, it can run Doom. (But it can’t run Minecraft.)