tau is a fully-featured, advanced attendance utility with an easy to use web interface. It allows you to perform most of the tasks of everyday personnel and student management. It also provides high security with various levels of users and also manages data regarding courses, classes, departments, students and their time-tables. Further, it can be used to generate various kinds of complex reports. Managing personal schedules and creating dynamic timetable formats are also possible. tau is written in PHP 3.x and uses PostgreSQL as the backend database.