This IBM Redbooks publication is Volume 4 of a five-volume set that is designed to

introduce the structure of an OS/390 and S/390 operating environment.

The set will help you install, tailor, and configure an OS/390 operating

system, and is intended for system programmers who are new to an OS/390

environment.

In this Volume, Chapter 1 provides an introduction to the basics of

mainframe networking concepts, including hardware connectivity, OSA/SF,

SecureWay Communication Server,

SNA (VTAM), and IP (TCP/IP).

Chapter 2 describes OS/390 security with RACF.

Chapter 3 provides on overview of OS/390 UNIX System Services.

Chapter 4 describes the Language Environment which provides a common

run-time environment for IBM versions of certain high-level languages

(HLLs), namely, C, C++, COBOL, Fortran, and PL/I.

Chapter 5 describes the Infoprint Server which is an optional feature of

OS/390 Version 2 Release 8 that uses OS/390 UNIX System Services. This

feature is the basis for a total print serving solution for the OS/390

environment. It lets you consolidate your print workload from many

servers onto a central OS/390 print server.