IRIS network codes: http://www.iris.edu/ds/nodes/dmc/services/network-codes/
Types: VBB (Very Broad Band), BB (Broad Band), SP (Short Period), SM (Strong Motion) and OBS (Ocean Bottom Sensor)
Classes: T1, T2, T3, T4; based on the Italian building code
EC8 types: A,B,C,D,E,S1,S2; more info here