A freshly instantiated process represents a set of launch parameters.

process

<process> ( -- process )

Words for launching processes take a fresh process which has never been started before as input, and output a copy as output.

process-started? ( process -- ? )

The process instance output by launching words contains all original slot values in addition to the handle slot, which indicates the process is currently running.

process-running? ( process -- ? )

It is possible to wait for a process to exit:

wait-for-process ( process -- status )

A running process can also be killed:

kill-process ( process -- )