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I was tempted to call this particular type of virus the Main Frame Virus, because of an incidence that happened many years ago in New York. One of my friends was on a training course at a leading manufacturer's school for a brand new and highly advanced computer operating system. One of its revolutionary features was a remote job entry system that no other operating system featured, so everyone thought. My friend had to correct his teacher on this point by pointing out that precisely such a remote job entry had been widely implemented years ago at his university. "No, that can't be. You are lying," the teacher said to my friend in essence. "If it hasn't been invented by us, it can't exist! End of story."