File:IBM Almaden (145378554).jpg
Original file (1,915 × 1,965 pixels, file size: 1.93 MB, MIME type: image/jpeg)
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Summary[edit]
DescriptionIBM Almaden (145378554).jpg |
…reflected in the cabinetry of the world’s first disk drive, the 1956 RAMAC prototype, on its 50-year anniversary. The size of a large refrigerator. 5 Megabytes on fifty 24” disks. 2KBits/sq. inch areal density; 20 tracks/inch; 100 bits/inch 8.8 kbits/second transfer rate. The disk drive has improved more dramatically than the semiconductor (reflected in Moore’s law). Disk drive areal storage density has improved over 35 million times since 1956. (<a href="http://www.research.ibm.com/journal/sj/422/grochowski.html">IBM Paper</a> with long term graphs) |
Date | |
Source | IBM Almaden |
Author | Steve Jurvetson from Los Altos, USA |
Licensing[edit]
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This image was originally posted to Flickr by jurvetson at https://flickr.com/photos/44124348109@N01/145378554. It was reviewed on 13 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
13 December 2020
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:29, 13 December 2020 | 1,915 × 1,965 (1.93 MB) | Eyes Roger (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Metadata
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Camera manufacturer | Panasonic |
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Camera model | DMC-FX7 |
Exposure time | 1/10 sec (0.1) |
F-number | f/2.8 |
ISO speed rating | 200 |
Date and time of data generation | 17:11, 10 May 2006 |
Lens focal length | 5.8 mm |
JPEG file comment | AppleMark |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | QuickTime 7.0.4 |
File change date and time | 17:14, 11 May 2006 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 17:11, 10 May 2006 |
Meaning of each component |
|
Image compression mode | 4 |
APEX exposure bias | −0.66 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |