| 单词 | multiplying punch |
| 释义 | > as lemmasmultiplying punch multiplying punch n. Computing (now historical) a punched-card machine for performing multiplication, often in conjunction with addition or subtraction. ΚΠ 1934 Ann. Math. Statistics 5 160 The recent development of the Automatic Multiplying Punch is unquestionably the most important contribution to the mechanics of mathematical statistics since the invention of adding and multiplying machines. 1949 E. C. Berkeley Giant Brains iv. 47 The chief IBM punch-card machines are: the key punch, the verifier, the sorter, the interpreter, the reproducer, the collator, the multiplying punch, the calculating punch, and the tabulator. 1985 P. Ceruzzi in Man. Operation Automatic Sequence Controlled Calculator (Charles Babbage Inst. Reprint Series Hist. Computing Vol. VIII) Introd. p. xxii A decimal calculator may perform multiplication by two methods: by repeated addition and shifts or by looking up digit products in an internal table. The Mark I used an internal table, using an arrangement first developed by IBM a decade earlier for the 601 multiplying punch. < as lemmas |
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