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6:05 PM
Computer science is not necessarily how a computer operates. It is a very broad term that can be hardware (though that is technically more electrical engineering), pure software, theoretical/quantum computing, OS design, and so on. The other two are more specific fields. I am not familiar with computational geometry but I assume it involves handling spatial information, possibly related to 3D rendering. Cryptography is a cybersecurity-related field linked to data encryption and protection.
 

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