"I would try out the language as it was being developed and make comments on it. It was part of the work atmosphere there. And you'd write something and then the next day it wouldn't work because the language changed. It was very unstable for a very long period of time. At some point, I said, no, no more. In an interview I said exactly that, that I didn't use it because it wouldn't stay still for two days in a row. When Stroustrup read the interview he came screaming into my room about how I was undermining him and what I said mattered and I said it was a bad language."

“I do believe that in a race, it is naive to think Linux has a hope of making a dent against Microsoft starting from way behind with a fraction of the resources and amateur labor.”

“We have persistent objects, they're called files.”

“If you want to go somewhere, goto is the best way to get there.”

“I think the major good idea in Unix was its clean and simple interface: open, close, read, and write.”

“Unix was built for me. I didn't build it as an operating system for other people, I built it to do games, and to do my stuff. I was always into games, games was my thing. I used to play pinball machines, and I would pick the lock in the back of pinball machines. Then I'd study the diagrams that I had. That's where I learned a lot of this kind of logic.”

“In Plan 9 and Inferno, the key ideas are the protocol for communicating between components and the simplification and extension of particular concepts. In Plan 9, the key abstraction is the file system—anything you can read and write and select by names in a hierarchy—and the protocol exports that abstraction to remote channels to enable distribution. Inferno works similarly, but it has a layer of language interaction above it through the Limbo language interface—which is like Java, but cleaner I think.”