英和和英

Purely mechanical processing (220-4) did not involve the use of electronic equipment ¹ which has come to replace the earlier tabulating machines ² or unit record machines ² and is much more versatile. In most instances the information is coded (221-1*) first, and then transcribed onto punch cards ³ by using a keypunch ⁴. A card verifier ⁵ is a device used to check the accuracy of the punching. These two types of unit record machines remain in common use since the punch cards are still a frequent way of entering data into the computer. The use of other types of unit record equipment such as the card sorter ⁶ and the tabulator ⁷ has declined. Increasingly, the data are entered directly on magnetic tapes (cf. 226-4) or disks (cf. 226-5) without resorting to punch cards.

• 3. Punch cards or punched cards.
• 4. Keypunch or card punch.

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