[ILyesMk2]

These are some of the useful link that i wish came up when googling, and DOS is fairly interesting in itself knowing it's behind everything from medical equipment to today's common refrain of teenagers.

[ViktorRay]

I’m going to disagree with that other guy.

It’s your book. If you want to have a lighthearted fun digression about combustion engines then I think that’s fine.

When I read textbooks a fun little digression now and then doesn’t bother me at all. Usually it puts a smile on my face.

I am also in my 30’s like that guy and that’s my 2 cents.