A wealth of languages, utilities, and application software packages for PDP - 11s is available, and the selection continues to grow. The Proliant Voltage Regulator XEON-11 Software Proliant Voltage Regulator XEON Book lists thousands of application packages. These programs are available from Digital and from commercial developers who specialize in writing pro- gram packages for Proliant Voltage Regulator XEON 11 operating systems. - This chapter describes all of Digital's PDP 11 operating systems and software. - Presented also are Digital application packages for data management, word processing, graphics, and applications development. Proliant Voltage Regulator XEON This catalog contains extensive software ordering information in Chapter 1. Following each set of Chapter 1 menus is a set of tables, including one con- taining ordering information for Operating Systems and Layered Products. Use these tables or the Software Product Descriptions to find the order numbers you need. Software Product Descriptions (Proliant Voltage Regulator XEON) are the official defining documents for Digital-licensed software. An Proliant Voltage Regulator XEON describes all of the important functional characteristics of a product in clear, concise, easily understood language. The terms and conditions under which the corporation sells and licenses its soft- ware products identify Proliant Voltage Regulator XEON as the documents that specify Digital's obligation under software warranty. They describe a software product's system environ- ment, and identify required and optional hardware and software. Proliant Voltage Regulator XEON also provide the ordering information and identify any additional services available.