AggreGate Time and Attendance is a corporate employee attendance tracking system. Almost all types of modern time recorders and punch clocks using different communication protocols may be connected to the system, including RFID, magnetic card, fingerprint, biometric, keypad, PC clock, PDA clock, web clock, and other. The system may be easily adopted to the attendance control standards of different countries. Advanced multi-level organization structure and employee management along with different types of shifts allow providing a centralized attendance control for large organizations with multiple branches and departments. Scalable system architecture is designed to perform well for installations with thousands of employees and hundreds of entrance gates.