1A process is a program in execution↩

2At the Open Source Summit held in Vancouver in 2018, Linus said: “No one knows the whole kernel. But, having looked at patches for many many years, I know the big picture.”↩

3Dennis Ritchie, one of the original creators of Unix, said in 1999: “I think the Linux phenomenon is quite delightful, because it draws so strongly on the basis that Unix provided”↩

4For the history of Linux see Appendix 3↩

5https://www.kernel.org/category/releases.html↩