Brik generates and verifies 32-bit CRC values (checksums). It is designed to generates CRCs for text files that are the same on all computer systems that use the ASCII chracter set, provided each text file is in the usual text file format for that system. Brik will also optionally use binary CRCs calculated using every byte in a file. Such binary CRCs are portable across systems for binary files that are moved from system to system without any newline conversion. Brik can be asked to decide by examining each file whether to calculate a text mode or binary mode DCRC for it.