Technology

Theoretically in the insanely far future we could eventually have computers that require no external energy to process things. The way transistors work now is that to turn a 0 into a 1 you input an electron and to turn a 1 back to a 0 you dump it out as heat. If you were instead to move that electron around losslessly then you would only need enough external power to cover any unideal components, if there are any. Of course such a thing would require a fundamental redesign on how computers work internally, but seeing as how similar research has been undergone for quantum computing i'm not going to be surprised if some space communist society finds a way to make it work.