System Administration Guide
Appendix C, UNIX directories and special device files

The root directory

The root directory

The root directory (/) contains these system directories:

UNIX command directory

device special directory

additional program and data file directory

C programming library directory

mount directory -- reserved for mounted filesystems

location of shared software storage object files

shared libraries

filesystem containing the kernel and boot files

TCB (Trusted Computing Base) security binaries and databases

temporary directory (reserved for temporary files created by programs)

user service routines -- may contain user home directories

location of non-shared software storage object files