# PID

A Process ID (PID) uniquely identifies a UNIX process.
On D3, each D3 process is a UNIX process, and, therefore, is assigned
a PID by UNIX. D3 processes are usually identified by their D3 port
number (from 0 to the maximum number of ports), as usual. It is sometimes
necessary to identify the PID of a D3 process. The PIDs are displayed
by the TCL commands list-users, pid, psr and by the UNIX command d3.

## See also

- [%kill() function](https://d3codex.com/pickbasic-flashbasic/percent-kill-function/)
- [%pgetpid() function](https://d3codex.com/pickbasic-flashbasic/percent-pgetpid-function/)
- [d3 command](https://d3codex.com/unix/d3-command/)
- [kill command](https://d3codex.com/tcl/kill-command/)
- [pid command](https://d3codex.com/tcl/pid-command/)
- [psr command](https://d3codex.com/tcl/psr-command/)

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Source: https://d3codex.com/definitions/pid/ - part of the D3Codex reference.