A part of [Concurrency concepts]. Under Unix at least, processes are the data construct used by the heart of the operating system when invoking a particular program. In Tcl, [exec] and ''[open] |...'' are your friends for starting helper processes. ---- To obtain a ps(1)-like list of Windows processes, use pslist from [pstools]. [[tlist?]] ---- To obtain a ps(1)-like list of Solaris or Linux processes, use '''procfs.tcl''' from http://inferno.slug.org/wiki/TclPsLib