This second edition focuses on the new versions of VTAM and NCP that implement not only traditional SNA, but also are required for implementing APPN. VTAM V4.1 and NCP V6.2 are covered in detail, as are the IBM controllers that can participate in APPN, the internetworking functionality of IBM 3174 Establishment Controllers and IBM 3745 Communications Controllers, and connectivity enhancements to mainframe applications using token-ring and ethernet local area network communications.

This text offers guidelines and techniques to move software applications from DOS to the OS/2 environment. It covers the DOS and OS/2 environment, explaining BIOS, INT 21, and Family API. It includes a sample DOS application using linked lists, video routines, file I/O and other support functions. It then presents the conversion of the sample DOS applications to OS/2 in C code using client, server, pop-up help facilities, DLL, Inter-Process Communication, Inter-Thread Communication, shared memory segments, and other OS/2 features.

This is the only book to cover advanced SNA topics for those who are experienced with Systems Network Architecture. Special attention is given to interconnectivity of heterogeneous SNA networks made necessary by corporate mergers and takeovers. Charts/graphs.