Having problems opening a cal file?

Find out what programs can help open, view, play or convert your cal files.

Opening cal files
CALS Raster Graphic

Did your computer fail to open a cal file? We explain what cal files are and recommend software that we know can open or convert your cal files.

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What is cal file?

1-bit (black and white) raster image; can be uncompressed or compressed using CCITT group 4 compression; available in Type I and Type II versions, though Type I is more common. CALS stands for "Continuous Acquisition and Life-cycle Support." The standard was developed by the U.S. Department of Defense as a means to electronically capture military documentation.

Software that will open, convert or fix cal files

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