> 68-XX Computer science > 68PXX Theory of data

68P01 General	68P05 Data structures	68P10 Searching and sorting
68P15 Database theory	68P20 Information storage and retrieval	68P25 Data encryption
68P30 Coding and information theory (compaction, compression, models of communication, encoding schemes, etc.)	68P99 None of the above, but in this section

68PXX Theory of data