> In what way? You're right to ask that. I thought the question was about how they are implemented at the OS level, where the answer would be an operating sys

> In what way? You're right to ask that. I thought the question was about how they are implemented at the OS level, where the answer would be an operating system book like "Advanced Programming in the Unix Environment". (It's been a while; I've forgotten how that book treats pipes and don't know if it's an appropriate answer to the question I thought was being posed.)