The .cal file extension is most commonly associated with scheduling and calendar applications. The CAL files contain the dates and events included in the calendar schedule and may also contain custom images for each calendar month.
The .cal file extension is also used for CALS Raster Group 1 image format files, CALS Raster Group 4 fax compressed bitmap files, CyberAudioLibrary link files, Daqarta extended audio data files and SuperCalc Worksheet files.
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If you have additional information about the CAL file format or software that uses files with the CAL suffix, please do get in touch - we would love hearing from you.