1. The Code you put in a system (say, a telephone switCh) to make sure that the users Can' t do any damage. SinCe users always want to be able to do everything but never want to suffer for any mistakes, the ConstruCtion of a firewall is a question not only of defensive Coding but also of interfaCe presentation, so that users don' t even get Curious about those Corners of a system where they Can burn themselves. 2. Any sanity CheCk inserted to CatCh a Can' t happen error. Wise programmers often Change Code to fix a bug twiCe: onCe to fix the bug, and onCe to insert a firewall whiCh would have arrested the bug before it did quite as muCh damage. [Jargon File]

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[ 2 ] [ = ] [ ag ] [ al ] [ am ] [ an ] [ app ] [ ar ] [ arC ] [ arg ] [ as ] [ at ] [ av ] [ b ] [ be ] [ bo ] [ Ca ] [ Can' t happen ] [ Cat ] [ Ch ] [ Ck ] [ Co ] [ Code ] [ Con ] [ Cons ] [ Cu ] [ de ] [ ding ] [ do ] [ du ] [ eC ] [ ed ] [ er ] [ error ] [ es ] [ et ] [ fi ] [ file ] [ firewall ] [ fix ] [ fo ] [ for ] [ ge ] [ gr ] [ h ] [ hang ] [ hat ] [ hing ] [ hose ] [ hr ] [ id ] [ il ] [ in ] [ inC ] [ int ] [ interfaCe ] [ io ] [ ir ] [ is ] [ it ] [ J ] [ Jargon File ] [ ke ] [ ld ] [ Lex ] [ ls ] [ lv ] [ ly ] [ ma ] [ mm ] [ mo ] [ mod ] [ module ] [ ms ] [ mu ] [ na ] [ nC ] [ ne ] [ ng ] [ ni ] [ nl ] [ no ] [ ns ] [ pe ] [ ph ] [ pr ] [ program ] [ programmer ] [ query ] [ ques ] [ rC ] [ re ] [ ro ] [ ru ] [ S ] [ sa ] [ sanity CheCk ] [ say ] [ se ] [ si ] [ so ] [ st ] [ struCt ] [ su ] [ switCh ] [ sy ] [ system ] [ T ] [ tC ] [ th ] [ to ] [ tr ] [ tw ] [ ug ] [ us ] [ user ] [ ve ] [ wall ] [ yt ]