Most foods which are high in fiber are also very good for you for other reasons. Take, for example, fruit and vegetables and whole grains, they are high in fiber but also rich in vitamins and other essential nutrients.
Raymond Lin's MD5 & SHA-1 Checksum Utility is a standalone freeware tool that generates and verifies cryptographic hashes in MD5 and SHA-1. The program has a basic, utterly functional interface that should pose no trouble for anyone with the knowledge and skill to actually need it.
Checksum is the general term. CRC is one kind of checksum. An FCS is. a checksum (typically a CRC) appended to a frame during serial data. transmission, so an FCS is one use of a praticular type of checksum. Some are better than others in detecting specific kinds of errors. Some are more easily computed in software or hardware.