TAILIEUCHUNG - Báo cáo khoa học: " An Input Device for the Harvard Automatic Dictionary"

A standard input device has been adapted to permit transcription of either Roman or Cyrillic characters, or a mixture of both, directly onto magnetic tape. The modified unit produces hard copy suitable for proofreading, and records information in a coding system well adapted to processing by a central computer. | Mechanical Translation July 1958 pp. 2-7 An Input Device for the Harvard Automatic Dictionary Anthony G. Oettinger Computation Laboratory Harvard University Cambridge Massachusetts A standard input device has been adapted to permit transcription of either Roman or Cyrillic characters or a mixture of both directly onto magnetic tape. The modified unit produces hard copy suitable for proofreading and records information in a coding system well adapted to processing by a central computer. The coding system and the necessary physical modifications are both described. The design criteria used apply to any automatic information-processing system although specific details are given with reference to the Univac I. The modified device is performing satisfactorily in the compilation and experimental operation of the Harvard Automatic Dictionary. THE PROPERTIES of a given automatic information-processing machine depend primarily on the algorithms the machine is capable of applying to the tokens 1 for the abstract elements it is said to process. Configurations of the states of sets of two-state devices or pulse trains where pulses are present or absent in definite time intervals are commonly used as tokens in contemporary machines. Abstract elements . the integers are named by symbols of various kinds. For example the numerals 2 II and 10 all name the number 2. Likewise various symbols can be used to name tokens. It is a useful and widely accepted convention to use the symbol 0 as the name for one state of a two-state device and the symbol 1 as a name for its other state. Frequently the symbols 0 and 1 are used also as binary numerals. In a context where both these usages occur a string such as 1001 t This work has been supported in part by the Harvard Foundation for Advanced Study and Research the United States Air Force and the National Science Foundation. 1. This term was originated by C. S. Peirce. For an explanation of the underlying distinctions see H. .

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