This is the
talk page for discussing improvements to the
Punched card article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
Archives: 1, 2, 3Auto-archiving period: 90 days |
A fact from this article was featured on Wikipedia's Main Page in the On this day section on June 8, 2004, June 8, 2005, June 8, 2006, June 8, 2007, June 8, 2008, June 8, 2012, June 8, 2014, and June 8, 2015. |
This
level-4 vital article is rated B-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||
|
Punch Cards (80 col, hollerith format) were also informally called "5081 cards". 5081 being the IBM part number printed in very small letter along the bottom of the card. This part number was likely for a standard punch card, with the stock printing across all 80 columns. Not certain, but I would expect a different number for other styles of printing (or possibly if the corner was cut on the other end).
Standard Form 5081 was a US Government Standard Form that adopted the IBM 5081 punch card standard. An example of the Standard Form 5081 is what is depicted in the 5081 card image on this page. These were in common use in the early '80s when I was a "Data Operator" at an Air Force Data Processing Center. Bowlingj ( talk) 20:00, 19 March 2012 (UTC)
Cards were typically available in buff (sort of an off beige natural color), red, green and blue.
The cards typically had a small numeral 9 printed on the bottom edge and a 12 printed on the top. This was because cards were usually fed face down, 9 edge first into the reader, with a sticker on the hopper thus instructing the operator. This inevitably led to the question "which is the 9 edge?", since that isn't intuitively obvious to the casual observer since the bottom of 12 rows would be the 9 row (the top two had various names, the bottom ten were row zero through 9). -anon 165.2.186.10 22:02, 1 December 2006 (UTC)
I worked on an 1BM 1401 with an 1402 card reader in the '70's. The machine indeed would stop if there was a card in upside down. I think instead of looking at the cut, it would look at the code in the card. If it made no sense (not a valid character), then the program would stop. It would give you an error. You would then do a "runout" and change the orientation of the card. Other machines did the same, The CDC 3300 also would stop on an card being upside down. —Preceding unsigned comment added by 160.91.217.105 ( talk) 21:15, 4 February 2008 (UTC)
I believe that there is also a 96 column read/punch for the 360/20. There is a 6 bit code which uses the lower rows only, and 8 bit code which also uses the upper rows (where characters are printed). Gah4 ( talk) 02:08, 12 June 2022 (UTC)
I haven't seen any punched cards actually in use for quite a while. Is there any manufacturer who is still making new blank cards, or have they been completely discontinued everywhere? If they are still available (other than "new old stock", NOS), where? If no longer available, when were they discontinued?
A quick search indicated that some knitting machines still use punched cards. Should this be mentioned in the article?
Reify-tech ( talk) 16:41, 6 April 2023 (UTC)
The article describes "mark sense (electrographic)" cards in the "Mark sense format" section. It may be worth mentioning that in the late 1960s Hewlett-Packard offered optical mark card readers for their HP 2100 series of minicomputers that could read cards marked with an ordinary No. 2 graphite pencil and did not require a special electrographic pencil. They were typically used for HP BASIC programming and had fields where a single mark would encode an entire key word, such as "FOR", "GOTO", etc. They had the same physical size as an IBM 80-column card and were mostly used in environments where multiple users shared a single computer, as in schools. These cards allowed users to write their programs almost anywhere without need for a keypunch machine, then have the computer read their deck of cards when they got their turn. When Hewlett-Packard introduced their time-sharing systems in the early 1970s, having magnetic mass storage on 14-inch disk drives and equipped with terminals such as the Teletype Model 33 that featured paper tape readers and punches, the need for the optical cards and readers quickly faded away. — Foxtrot1296 (talk) 17:04, 10 May 2023 (UTC)
The November 1917 issue of Popular Mechanics (page 673) describes the mechanical analysis of data on Hollerith Cards by Railroads to calculate the date, quantity, value and freight charges of the various commodities shipped by rail. 2600:1700:6AE5:2510:0:0:0:24 ( talk) 22:30, 6 March 2024 (UTC)
I noted there is virtually nothing of note said about the persons doing the feeding of the card deck into the machine - the Computer Operator I believe would be the appropriate title, while superficially a menial robotic task I would guess the task would have been fraught with special procedures and exceptions specific to every job site - it could be argued that these people were the human equivalent to the first Operating Systems and at least deserving of a historical nod. 123.243.139.186 ( talk) 01:28, 3 July 2024 (UTC)
Computer Operator I believe would be the appropriate titleGiven that punched card data predated computers, I would drop "computer" and just use "operator".
the human equivalent to the first Operating SystemsEven computers that used punched cards and that had operating systems also had operators. They may have had fewer punched-card-related tasks, as a given processing task may only have involved the computer rather than, for example, a card sorter and an accounting machine - or a card sorter and an older computer that read a full card deck and sort the data itself - and the operator wouldn't have to change the plugboard or load particular programs into the computer, but they did have to manage the operating system with console commands. Guy Harris ( talk) 01:42, 3 July 2024 (UTC)