Similar to Terminfo

Nm (Unix)

IBM High Availability Cluster Multiprocessing

Procfs

Setuid

Single UNIX Specification

STREAMS

Termcap

Tz database

Udev

UNIX System III

UNIX System V

The UNIX-HATERS Handbook

Unix-like

Unix wars

List of POSIX commands

X Window System

XFS

Xinetd

ZFS

Interix

Open system (computing)

Virtual console

Pseudoterminal

Getty (software)

Shell (computing)