keypunch machine การใช้

• Businesses were familiar with storing data on punched cards and keypunch machines were widely employed.
• TSO eliminated the need to punch cards on a keypunch machine, and send card reading machine.
• Businesses were familiar with storing data on punched cards, and keypunch machines and their operators were widely employed.
• Some early keypunch machines used a keyboard with 12 labeled keys to punch the correct holes in paper cards.
• The computer replaced the keypad unit from an old keypunch machine which had been originally installed by Richard Greenblatt.
• Punch cards for other applications are not prescored and are punched by keypunch machines, which do not leave dangling chads.
• Mark sensing allowed a person to enter data to be used in punched-card data processing without using a keypunch machine.
• So you had at least 2 sources of error, one your logic and syntax, the other typographical errors as you used the keypunch machine.
• Unlike earlier keypunch machines, the program cards were read into memory via the regular card-feed path, and were not wrapped around a " program drum ".
• Thanks to all the readers who wrote of their close encounters with chad ( or perf or chips ) in the days of teletype and keypunch machines.
• The original data entry was done on upper-case only keypunch machines; capitals were indicated by a preceding asterisk, and various special items such as formulae also had special codes.
• When used in a room also containing 029 keypunch machines, the verifier operators sometimes missed the auditory feedback provided by the loud " thunk " noise emitted by the older 056.
• You then had to go to a keypunch machine to turn these commands into a series of punch cards which you could then submit to the appropriate office as a " job ".
• Data processing technicians operated data processing equipment including keypunch machines, sorters, collators, reproducers, tabulating printers, and computers; performed the administrative tasks for operating computer facility, including the handling of all classified material passing into or out of a computer system; designed, developed, tested, and maintained computer software.