The following chapters describe how to set up a secure system according to your security policy. The Authorize utility (AUTHORIZE) is the primary tool for implementing system security. AUTHORIZE is described fully in the HP OpenVMS System Management Utilities Reference Manual. The AUTOGEN command procedure, which you use to modify the system parameters file, is described in the HP OpenVMS System Manager's Manual and the HP OpenVMS System Management Utilities Reference Manual. Many DCL commands are also important security tools. DCL commands are described in the HP OpenVMS DCL Dictionary.