According to my research, they do recognize CCR as an
abbreviation for them. Be careful though, as CCR is an abbreviation
for many things. Make sure you are clear on which CCR you are
talking about if you use that abbreviation.
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AC stands for all clear on a calculator
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computed tomography angiography or clear to ausculatation
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This question is not clear. "OZ" is an abbreviation for ounce.
If this does not answer your question, ask it again using words
that make it clear what you want to know.