In spite of the fact that use of jargons is considered many bad form, they are widely applied by representatives of many professions. The slangy term in most cases where lakonichny official and therefore it can be said or written quicker.
If you hear from the repairman that the section of the conductor is measured in "squares", from the driver - that the engine "troit", from the radio operator - that "in the evening on eight-ten good pass" and from the programmer - that it "chmodit the file" or that at it "the screw departed", do not try to find an explanation of these expressions in professional literature - they are definitely not there! Before you - the jargons developed by representatives of various professions. They are not recorded officially anywhere, but experts (in any case, within the same profession) freely use them in a conversation and perfectly understand each other. Origin of slangy terms variously. Some of them can be reductions official, for example, passing - pass, the untying chain - an outcome, square millimeters - squares to change access rights to the file the chmod team - to chmodit. Some are borrowed from foreign languages, for example, an amfenolny cable or just an amphenol - a cable which design is for the first time developed by the Amphenol company, a fritter - the crash suppressor at a set of the phone number. There are even slangy terms obliged by the origin to sense of humour of authors, for example, a pig - a design of the lowering transformer, a chisel - the VAZ-2109 car. The word "slang" comes from French, means an adverb or a dialect. The slang is available not only for various experts, but also for representatives of the most various social groups - from athletes to criminals. A jargon is called the separate term which is a part of any given slang. There is an opinion that the purpose of the use of jargons is concealment of the value told from profane persons. It's not true is to find if desired value of any slangy term in the Internet or the special dictionary (but, besides, not in professional literature) anyone can. The real purpose of the use of such words is only desire to reduce a phrase. The moderate use of jargons almost does not cut hearing, however, abuse of them looks from outside at least ridiculously.