> 68-XX Computer science > 68MXX Computer system organization

68M01 General	68M07 Mathematical problems of computer architecture	68M10 Network design and communication
68M12 Network protocols	68M14 Distributed systems	68M15 Reliability, testing and fault tolerance
68M20 Performance evaluation; queueing; scheduling	68M99 None of the above, but in this section

68MXX Computer system organization