File:HP magnetic card.jpg
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Size of this preview: 800 × 381 pixels. Other resolutions: 320 × 152 pixels | 640 × 305 pixels | 1,024 × 488 pixels | 2,100 × 1,000 pixels.
Original file (2,100 × 1,000 pixels, file size: 805 KB, MIME type: image/jpeg)
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This is a file from the Wikimedia Commons |
Summary
| Description |
English: A magnetic storage card (front and backside) for Hewlett-Packard (HP) programmable calculators HP-41, HP-65, HP-67, and HP-97. The arrows with numbers 1 and 2 on the left and right edges indicate that the card may be used in both directions in order to use the full storage capacity - which was, however, very small with only about 500 Bytes or 0.5 Kilobytes (already using both directions). HP invented these cards with the programmable calculator HP-65 in 1974, which was the first of its kind on the market. The necessity of such a storage device - which would be comparable to the later diskette drives or much later USB memory sticks - was that the main memory (RAM) of the calculator was emptied when the device was powered off, hence all program data and application data was lost, unless stored on such a card. |
| Date | |
| Source | Own work |
| Author | Sciking |
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: removed background, horizontal straightening, technical shadow. Modifications made by Auge=mit.
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Licensing
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International 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 give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:01, 27 October 2020 | | 2,100 × 1,000 (805 KB) | Auge=mit | removed background, horizontal straightening, technical shadow |
| 06:00, 27 October 2020 |  | 2,182 × 1,023 (1.12 MB) | Wickipädiater | background | |
| 01:01, 27 October 2020 |  | 2,069 × 909 (641 KB) | Wickipädiater | +cropped -background | |
| 14:54, 16 March 2018 |  | 3,264 × 2,448 (2.27 MB) | Sciking | User created page with UploadWizard |
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