IBM 519

IBM 519

The IBM 519 Electric Document Originating Machine, introduced in 1946, was the last in a series of unit record machines designed for automated production of punch cards. It could reproduce all or parts of the information on a set of cards; copy the information from a master card onto a group of detail cards; printing up to eight digits on the end of the card; compare two decks of cards, punch summary information provided by an accounting machine. It could operate at 100 cards per minute.

Optional features allowed the 519 to read pencil marks on cards and punch the data they contain, and to number cards consecutively. The 519 was programmed by wiring a removable control panel.

IBM called the operation of converting cards marked with pencil marks into punched cards “mark sensing.” Mark sensing allowed a person to enter data to be used in punched-card data processing without using a key punch machine. It was used for tasks like recording long distance calls and meter readings.

Unlike other types of IBM unit record equipment, the 519 fed cards face down 12 edge first. The advantage of this was worn out decks from other equipment (which fed cards face down 9 edge first), having frayed 9 edges would still feed reliably through the reproducer, allowing a fresh copy to be made.

References

*cite book
last = IBM
title = IBM Reference Manual: 519 Document-Originating Machine
date = 1959
id = A24-1017-0
url = http://www.bitsavers.org/pdf/ibm/cardProc/A24-1017-0_519_docOrigMach.pdf

External links

* [http://www.columbia.edu/acis/history/reproducer.html Columbia University Computing History: IBM Reproducing/Summary Punches] .


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • List of IBM products — The following is a list of notable products from the International Business Machines (IBM) Corporation and its predecessor corporations, beginning in the 1890s, and spanning punched card machinery, time clocks, and typewriters, via mainframe… …   Wikipedia

  • Unit record equipment — Before the advent of electronic computers, data processing was performed using electromechanical devices called unit record equipment, electric accounting machines (EAM) or tabulating machines. Unit record machines were as ubiquitous in industry… …   Wikipedia

  • Mark sense — Main article: Unit record equipment Electrographic is a term used for punched card and page scanning technology that allowed cards or pages marked with a pencil to be processed or converted into punched cards. That technology was sold by IBM, its …   Wikipedia

  • Punched card — Overpunch redirects here. For the code, see Signed overpunch. A punched card, punch card, IBM card, or Hollerith card is a piece of stiff paper that contains digital information represented by the presence or absence of holes in predefined… …   Wikipedia

  • Computer programming in the punched card era — Punched card from a Fortran program. From the invention of computer programming languages up to the mid 1980s, many if not most computer programmers created, edited and stored their programs on punched cards. The practice was nearly universal… …   Wikipedia

  • File comparison — in computing is the automatic comparing of data between files on a file system. The result of comparisons are typically displayed to the user, but can also be used to accomplish tasks in networks, file systems and revision control.Examples of… …   Wikipedia

  • History of computing hardware — Computing hardware is a platform for information processing (block diagram) The history of computing hardware is the record of the ongoing effort to make computer hardware faster, cheaper, and capable of storing more data. Computing hardware… …   Wikipedia

  • SQL — This article is about the database language. For the airport with IATA code SQL, see San Carlos Airport. SQL Paradigm(s) Multi paradigm Appeared in 1974 Designed by Donald D. Chamberlin Raymond F. Boyce Developer …   Wikipedia

  • Fabricant de semi-conducteurs — Liste des principaux fabricants de semi conducteurs au fil des ans Cet article présente le classement par chiffres d affaires des sociétés fabriquant des semi conducteurs ou puces électroniques au fil des ans. On distingue trois types de… …   Wikipédia en Français

  • Fabricant électronique — Liste des principaux fabricants de semi conducteurs au fil des ans Cet article présente le classement par chiffres d affaires des sociétés fabriquant des semi conducteurs ou puces électroniques au fil des ans. On distingue trois types de… …   Wikipédia en Français

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”