A true story, from someone who was there at the time, circa 1980. It seems that our favorite telephone company had a terrible problem: employees were pilfering office supplies for their children. In par- ticular, three-hole loose-leaf binder paper. It was decreed by the powers that be that this sort of waste was unacceptable, and a long- forgotten bureaucrat was assigned the task of discouraging theft of three-hole paper. The bureaucrat's solution was simple: the company would now use *four*- hole paper, with the holes drilled differently so as to be incompatible with the typical school-child's binder. Four-hole loose-leaf paper was ordered, along with proper four-ring binders; new manuals, documentation, and other papers were likewise printed on four-hole paper, so all binders and paper would be happy and consistent throughout the company. The result was, naturally, that employees stole both the binders and the paper. Since the company was now suffering larger losses than before, it was decreed that the they would return to traditional three-hole paper and binders. But there was the problem of an existing large inventory of four-ring binders. Hence, with truly Solomonic wisdom, it was further decreed that all new paper would have seven holes, and would thus be both upward and downward binder-compatible. And, to this day, 8+1/2 by 11 documents from our favorite telephone company still have 7 holes in them. All of which nicely demonstrates that System V Release 1 and System V Release 4 were not a fluke. <csg> [For the benefit of those not UNIX-literate: System V Release 1 ignored BSD UNIX and really hoped it would go away. System V Release 4 wants to be compatible with every UNIX in existence.]
(From the "Rest" of RHF)