0 a number that is obtained by adding all the numbers in a piece of electronic data, used in order to check that the data is correct -- 检查和（用以校验数据项的和）
If modifying the export clauses left the module checksum number invariant, the project manager will fail at ensuring the coherency between modules.
This checksum is the result of the dug evaluation.
All memory is checked and errors corrected using checksums.
Finally, a checksum is computed and produced as output.
If the checksums are equal it will return true, otherwise it will return false.
Error-checking would be a necessary feature for long enough messages and this can be achieved by, say, adding a checksum.
They then proceed to make the text file and checksum available to all participants.
Consequently, the router must calculate a new checksum.
