To help users of the MSC, there are two conversion tables.
The first table gives, for each 1991 classification that does not appear in MSC2000, the classification(s) in MSC2000 that are most likely to be used for items that would previously have been classified using the old classification.
The second table gives, for each new classification in MSC2000, the classification(s) in the 1991 MSC that are most likely to have been used earlier for items classified using the new classification.
In addition, there is a list of the changes to the Mathematics Subject Classification at the 2-digit Level.
© copyright 1999, American Mathematical Society.