| 释义 |
ˈoverpunch, n. Computers.
[over- 1 d.]
A hole or hole position in the upper portion of a punched card.
1969Maisel & Wright Introd. Electronic Digital Computers xiii. 325 If the overpunch is a 12, the number is positive, and if it is an 11 punch, the number is negative. 1970O. Dopping Computers & Data Processing ii. 44 The two top rows are called zone punches or overpunches. The uppermost row is called 12 or Y, the second from the top, 11 or X. In addition, the uppermost numerical row, the 0 row, is used as a third overpunch. 1973Murrill & Smith Introd. Computer Sci. vi. 219 When programs written in programming languages such as Cobol read numerical data, the sign does not normally occupy a separate column. Instead, it is entered as an overpunch in the rightmost digit.
So ˈoverpunch v. trans., to represent by means of an overpunch; ˈoverˌpunching vbl. n.
1962Gloss. Terms Automatic Data Processing (B.S.I.) 90 Over-punching, the use of the upper curtate to represent a digit independently of the use of the lower curtate. 1973Murrill & Smith Introd. Computer Sci. vi. 220 Figure 6·6 also illustrates the situation when the & symbol is overpunched in the same column as the 3. |