FACT: A Brief Description of the Contents of FACT.SYS, the Accounting System Records File

This document provides a technical specification for the FACT.SYS file, which is used to store accounting and activity transaction records on a DECsystem-10 timesharing system.

Key features include: * Data Collection: Details how system programs record user logins, logouts, batch jobs, and I/O spooler activities. * Auxiliary Files: Explains the mechanism for using auxiliary files (FACT.X01 through FACT.X77) when the primary FACT.SYS file is inaccessible. * Entry Format: Defines the structure of standard entries, including header information like type codes, job numbers, and timestamps, as well as specific data formats for events like Login, Logout, Checkpoints, and Spooling. * Customization: Outlines how users can implement custom entry types and use supported or unsupported tools for processing and reporting on FACT file data.