IS缩写的意思

DCN mcu ETE APARS Bps FED RAID EEROM SSG EFCI DS MADP QDOS DTP IM EF DVC SOC CTDM SFB DTD RIP NDS DVVI ESC DFSK AP CC GPS CAI APADAS IS-IS DCT EELS DFOS EWT ABDL GIMM EAF NCBA GDPS DPON CPM SSM CSE CICS ppm ASI AFC CRC CPS AJG STB UMTS S3 ASC DL FCN CNCC IOB