3 ms·
Has anyone else ever encountered 3x5 cards which are punched and numbered along their perimeter? Saw such a setup once where for each number was assigned a cat
by WillAdams 2y ago
Has anyone else ever encountered 3x5 cards which are punched and numbered along their perimeter?
Saw such a setup once where for each number was assigned a categorization different from the ordering, and for a given card, the matching hole would be opened up, then when searching a set of cards a rod would be inserted at the hole in question and lifted up and jostled, causing the matching cards to be revealed for inspection.
Unfortunately, didn't think to ask if was a product, or a mechanism devised by the owner's parent....
- zabzonk 2y agoYep, I've used these a long time back when I was a microbiologist, for categorising bacteria. Using two rods meant you could do an AND search in one operation. Also, if you clipped the wrong hole, you could fix it with Sellotape. I can't remember what they were called though. Fun to be reminded of them!
- yesfitz 2y agohttps://en.wikipedia.org/wiki/Edge-notched_card https://en.wikipedia.org/wiki/Edge-notched_card "Needle Card", "McBee Card", "Indecks", "E-Z Sort", "Cope-chat", "Keysort", "Flexisort", "Velom card", "Rocket card", "Slotted card" and variations on those all redirect to that article[1]. 1: https://en.wikipedia.org/w/index.php?title=Special:WhatLinksHere/Edge-notched_card&limit=500 https://en.wikipedia.org/w/index.php?title=Special:WhatLinks...
- EvanAnderson 2y agoAdvent of Computing did an episode about edge-notched cards (and the host has an interest in them that goes beyond just this episode): https://adventofcomputing.com/?guid=4f6df5dd432d489db6d2a211bdb45403 https://adventofcomputing.com/?guid=4f6df5dd432d489db6d2a211... Douglas Englebart apparently used them and had devised his own filing system. (I don't recall if that's discussed in this or another episode.)