Image: Remington Rand punched card.mw

Description: Remington Rand punched card at the bottom, IBM card at the top. Note that the Remington Rand card has round holes. There are 45 columns and two groups of six rows each that are encoded independently, for a total of 90 possible encoded characters. The IBM card has rectangular holes and 80 columns, with only one character per column.
Title: Remington Rand punched card.mw
Credit: Flickr: Punched cards
Author: Marcin Wichary
Permission: This image, which was originally posted to Flickr.com, was uploaded to Commons using Flickr upload bot on 03:36, 30 December 2012 (UTC) by ArnoldReinhold (talk). On that date, it was available under the license indicated. This file is licensed under the Creative Commons Attribution 2.0 Generic license. You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). http://creativecommons.org/licenses/by/2.0 CC BY 2.0 Creative Commons Attribution 2.0 truetrue
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