[mixmastamyk]

DOS had pipes since version 2.0 I believe.

But the main point, that DOS was basically a thin program loader that "got out of the way" is sound. Think of it like a UEFI shell environment, with 640k+ limits.

[unilynx]

Dos pipes were just writes and reads to temporary files. No parallel processes

[mixmastamyk]

Ok, but didn't concern the end user, as far as I can remember.