Image:Kugleramme.jpg

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English: An abacus from a Danish elementary school. Early 20th century. Size: 40 cm wide, 46 cm high.
Español: Un ábaco de una escuela elemental danesa. Principios del siglo XX. Tamaño: 40 cm ancho, 46 cm alto.
Public domain I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

In case this is not legally possible:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. If that release is invalidated for any reason I also grant permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation if I upload the picture after May 12 2007.

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Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified image.

Camera manufacturer Canon
Camera model Canon PowerShot A80
Horizontal resolution 180 dpi
Vertical resolution 180 dpi
File change date and time 12:26, 21 April 2005
Y and C positioning 1
Custom image processing Normal process
Exposure mode Auto exposure
White Balance Auto white balance
Digital zoom ratio 1
Scene capture type Standard
Exposure time 1/60 sec (0.0166666666667)
F-number f/4
Exif version 2.2
Date and time of data generation 12:26, 21 April 2005
Date and time of digitizing 12:26, 21 April 2005
Image compression mode 3
Shutter speed 5.90625
Aperture 4
Exposure bias 0
Maximum land aperture 4
Metering mode Pattern
Flash 89
Lens focal length 16.21875 mm
Colour space sRGB
Focal plane X resolution 8114.28571429
Focal plane Y resolution 8114.28571429
Focal plane resolution unit inches
Sensing method One-chip colour area sensor
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