Introduction Editor's Note: We normally tell you t h a t camerar e a d y copy is not the best way to submit material to Quote Quad. Here is the exception to the rule. The following article was typeset by ItLTEX and supplied to us in camera-ready form. While we typically t r y to give all articles in Quote Quad a uniform appearance, we certainly w a n t e d this one to be an example of the process t h a t it is describing. At the 1963 A C M Working Conference on Mechanical Language Structure held at Princeton It. A. Brooker succinctly formulated the first version of the A P L character set problem: W h y do you insist on using a notation which is a nightmare for typist and compositor and impossible to implement with punching and printing equipment currently available? - I t . A . Brooker, 1963 [Iverson 63] In a recent article [Bernecky 90] 1t. Bernecky gave a lucid description of the problems created by the A P L character set and a summary of the current state of atTalrs: the API~ character set creates problems on
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