Book excerpt: Windows NT is especially suited for users that have come from UNIX backgrounds and expect levels of security, stability and functionality which neither Windows 3.1 or Windows 95 can offer. For environments where connectivity, security and stability are essential, Windows NT provides an ideal solution. The Windows NT version 4 pocket book is a concise reference source for users of the latest version of the Windows NT operating system. With its Windows95 shell, version 4 is a complete update of Windows NT with new commands and accessories and updates for all of the existing facilities. To help both new and old users' transition to this new environment,it provides both explanations and screenshots to guide and inform. Based on the Newnes Windows NT Pocket Book, it has been completely revised for the introduction of version 4 with all new screen shots and fully updated text. It follows the same format of combining simple explanations with screen shots of windows and dialogue boxes for the various key parts of the system such as the Control Panels, Administrative tools, installation and user interface. The most frequently performed tasks such as disk formatting, setting up printers and networks and so on are explained both for Windows NT version 4 and version 3.x to provide a comprehensive guide. portability true multitasking multi-threading