CR2CR3
CR2CR3 is not a standardized term with a single, established meaning in major technical fields. It is most often encountered as a concatenation of two related concepts, rather than as a formal concept by itself. In practical contexts, CR2CR3 may be used to refer to discussions or workflows that involve both Canon RAW formats CR2 and CR3, rather than to a single file type.
In photography, CR2 denotes Canon RAW Version 2, an older Canon RAW format used by many cameras
Software support varies by program. Many major image editors and raw converters read CR2 and CR3 individually,
Outside photography, CR2CR3 has no widely recognized standard meaning and can appear as a placeholder label