Initialism of driver's licence number.

(computing) Initialism of Data Link Layer. / (computing) Initialism of doubly-linked list. / (computing) Initialism of dynamic-link library. / (electronics) Initialism of delay-locked loop.

Initialism of dead letter office.

(computing, informal) Problems caused by incompatible versions of a DLL (dynamic-link library).

(computing) digital linear tape: a computer storage tape format having a single spooled cartridge using multitrack linear serpentine recording on a half-inch wide tape.

(video games) Initialism of downloadable content: an expansion pack for a video game.

(US politics, historical, 1985–2011) Initialism of Democratic Leadership Council.

(philately) Initialism of De La Rue. (stamp and banknote printers) / (rail transport, UK) Initialism of Docklands Light Railway.

(planetology, areology) Initialism of double-layer ejecta.

(software) Initialism of Distributor License for Java.