systemitem A system-related item or term daemon A daemon or other system process (syslogd) domainname A domain name (example.com) etheraddress An ethernet address (00:05:4E:49:FD:8E) event An event of some sort (SIGHUP) eventhandler An event handler of some sort (hangup) filesystem A filesystem (ext3) fqdomainname A fully qualified domain name (my.example.com) groupname A group name (wheel) ipaddress An IP address (127.0.0.1) library A library (libncurses) macro A macro netmask A netmask (255.255.255.192) newsgroup A newsgroup (comp.text.xml) osname An operating system name (Hurd) process A process (gnome-cups-icon) protocol A protocol (ftp) resource A resource securitycontext A security context (a role, permission, or security token, for example) server A server (mail.example.com) service A service (ppp) systemname A system name (hephaistos) username A user name (ndw) Identifies the nature of the system item Identifies the nature of the non-standard system item Identifies the kind of systemitemgraphic identifier other Indicates that the system item is some 'other' kind.

option An option for a software command

optional Optional information

property A unit of data associated with some part of a computer system