daemon
n. countablen. a computer program that runs in the background to help other programs or the system. It does its work quietly without you having to open a window for it.
n. a computer program that runs as a background process rather than in response to direct user commands. Often used in Unix-like operating systems to manage system tasks or network services.
The server runs a daemon to handle incoming emails.
System administrators often check the status of the print daemon to ensure that all printers are functioning correctly.
Modern operating systems rely on a suite of daemons to manage everything from network connectivity to hardware monitoring, ensuring the system remains stable even when no user is logged in.
A borrowing of Latin daemōn (“tutelary deity”), from Ancient Greek δαίμων (daímōn, “dispenser, tutelary deity”).
A reference to Maxwell's demon. The putative derivation from "disk and execution monitor" is generally considered a backronym.