(colloquial) the application of maximum thrust; "he moved
the throttle to the firewall"
(computing) a security system consisting of a combination of hardware and software that limits the exposure of a computer or computer network to attack from crackers; commonly used on local area networks that are connected to the internet
a fireproof (or fire-resistant) wall designed to prevent the spread of fire through a building or a vehicle
From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
Dictionary De - En
De - Es
De - Pt