I have a more mixed approach.

Decisions or attempts, i try to document them as comments on the ticket. It feels a bit like a conversation with my future self 😄

Things that pop up in my head that I don’t want to forget, but don’t have time to write out, I put in a new tab on nodepad++

Archi things go as markdown in de source code

Investigations and reports in a wiki

All these have all the pros of an engineering handbook out of the box (date, issuer, …)

I only use paper for the stuff I don’t want a trail off and just want to throw away afterwards.

In c they do indeed just mean shorter and longer int as the size of the int is defined by the compiler and target and originally represented the hardware.

There are types like int32_t or int_least16_t.