A hole or hole position in the upper portion of a punched card, used to modify the information coded in the lower portion. Also called zone punch…
| 单词 | θ116232 | 
| 释义 | society > computing and information technology > hardware > secondary storage > 			[noun]		 > punch card or tape > types of hole (2)		 overpunch1947 A hole or hole position in the upper portion of a punched card, used to modify the information coded in the lower portion. Also called zone punch… zone1950 A hole in certain punched cards that is punched above the column of holes representing non-zero digits and is used in conjunction with these latter… | 
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