AST缩写的意思

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