PDN缩写的意思

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