Evolution of Unix Facilities

  1. User commands
  2. System calls
  3. C library functions
  4. Devices and special files
  5. File formats and conventions
  6. Games et. al.
  7. Miscellanea
  8. System maintenance procedures and commands
  9. System kernel interfaces

The source code for creating this site is available in https://github.com/dspinellis/unix-history-man.