GSM缩写的意思

CSD SDS ASPC CMC CEL IMAP ECS CAT CAP SDA CAMPER CAPP CLE CEM EIA CDI CAE CSTS BOB ACS CAE IEEE-CS NU CSD CAD OBC CGRM CARE GAPP PCMCIA CAP PCC ICS PD AST CBG SE VCL SWI CSTNET INDA CDS CENSA CTF ICP SGU ETX ICS CAT SA&SD ACC AAS NPC CPL IPLI PCCG CMC CADD TMCC GPDC