Labels:text | screenshot | display | diagram | rectangle | number | parallel | font | plan | line OCR: User Shell and Applications A-M API Interactive Services API Messaging Interactive Protocol Protocol Sockets API Microsoft At Work Fax MSSPX Protocol Microsoft at Work Parallel Port Protocol 1992 T.30 MSIPX DD Fax Modem NDIS 2 LAN PN1284 Device Driver Device Driver Device Driver Figure 3 - Internals of the Communications module and associated interfaces (Source Microsoft)