POSIX ISO/IEC 9945-1:1990 definitions

2.2.1 Terminology
2.2.1.1 conformance document
2.2.1.2 implementation defined
2.2.1.3 may
2.2.1.4 obsolescent
2.2.1.5 shall
2.2.1.6 should
2.2.1.7 supported
2.2.1.8 system documentation
2.2.1.9 undefined
2.2.1.10 unspecified
2.2.2 General terms
2.2.2.1 absolute pathname
2.2.2.2 access mode
2.2.2.3 address space
2.2.2.4 appropriate privileges
2.2.2.5 background process
2.2.2.6 background process group
2.2.2.7 block special file
2.2.2.8 character
2.2.2.9 character special file
2.2.2.10 child process
2.2.2.11 clock tick
2.2.2.12 controlling process
2.2.2.13 controlling terminal
2.2.2.14 current working directory
2.2.2.15 device
2.2.2.16 directory
2.2.2.17 directory entry
2.2.2.17 link
2.2.2.18 dot
2.2.2.19 dot-dot
2.2.2.20 effective group ID
2.2.2.21 effective user ID
2.2.2.22 empty directory
2.2.2.23 empty string
2.2.2.23 null string
2.2.2.24 Epoch
2.2.2.25 feature test macro
2.2.2.26 FIFO special file
2.2.2.26 FIFO
2.2.2.27 file
2.2.2.28 file description
2.2.2.29 file descriptor
2.2.2.30 file group class
2.2.2.31 file mode
2.2.2.32 file mode bits
2.2.2.33 filename
2.2.2.34 file offset
2.2.2.35 file other class
2.2.2.36 file owner calss
2.2.2.37 file permission bits
2.2.2.38 file serial number
2.2.2.39 file system
2.2.2.40 foreground process
2.2.2.41 foreground process group
2.2.2.42 group ID
2.2.2.43 job control
2.2.2.44 link
2.2.2.45 link count
2.2.2.46 login
2.2.2.47 login name
2.2.2.48 mode
2.2.2.49 null string
2.2.2.50 open file
2.2.2.51 open file descriptor
2.2.2.52 orphaned process group
2.2.2.53 parent directory
2.2.2.54 parent process
2.2.2.55 parent process ID
2.2.2.56 path prefix
2.2.2.57 pathname
2.2.2.58 pathname component
2.2.2.59 pipe
2.2.2.60 portable filename character set
2.2.2.61 privilege
2.2.2.62 process
2.2.2.63 process group
2.2.2.64 process group ID
2.2.2.65 process group leader
2.2.2.66 process group lifetime
2.2.2.67 process ID
2.2.2.68 process lifetime
2.2.2.69 read-only file system
2.2.2.70 real group ID
2.2.2.71 real user ID
2.2.2.72 regular file
2.2.2.73 relative pathname
2.2.2.74 root directory
2.2.2.75 saved set-group-ID
2.2.2.76 saved set-user-ID
2.2.2.77 seconds since the Epoch
2.2.2.78 session
2.2.2.79 session leader
2.2.2.80 session lifetime
2.2.2.81 signal
2.2.2.82 slash
2.2.2.83 supplementary group ID
2.2.2.84 system
2.2.2.85 system process
2.2.2.86 terminal
2.2.2.86 terminal device
2.2.2.87 user ID
2.2.2.88 user name
2.2.2.89 working directory
2.2.3 Abbreviations
2.2.3.1 C Standard
2.2.3.2 POSIX.1
2.2.3.3 IRV