10 minor criteria of Unix
-- extracted from "Linux/Unix Design ideas"
(0) allow users to customize the environment.
(1) make the operating system kernel small and lightweight as far as possible.
(2) use lowercase letters and try to keep them short.
(3) protect trees.
(4) Silence is golden.
(5) thinking in parallel.
(6) the sum of each part is greater than that of the whole.
(7) look for 90% solutions.
(8) worse is better.
(9) hierarchical thinking.
