pp缩写的意思

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