Repeated words after abbreviations(Usage Disputes)
Disputes occur about the legitimacy of placing after an acronym/ initialism the last word that is abbreviated in it, e.g., "AC current", "the HIV virus". "AC" and "HIV" by themselves will certainly suffice in most contexts. But such collocations tend to become regarded as irreducible and uninterpretable words. "The SNOBOL language" and "BASIC code" are as good as "the BASIC language" and "SNOBOL code"; and why should "an LED display" (Light Emitting Diode display) be reasonable, but not "an LCD display" (Liquid Crystal Display display)? The extra word may guard against ambiguity; e.g., "I've forgotten my PIN" might be mistaken in speech as being about sewing, whereas "I've forgotten my PIN number" identifies the context as ATMs. It cannot be denied, though, that many such repetitions stem from ignorance. The more familiar someone is with computer memory, the less likely he is to say "ROM memory" or "RAM memory".
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