Attendance SIOS software uses the attendance machine integration feature live. Employee attendance data on attendance machines will be sent automatically within 1-2 seconds. Of course this will greatly save time and effort. If you have many branches of the company that are located far enough away from the company's office, then this online absent software can be a solution for you. SIOS Time Attendance was developed as the best HRIS solution for managing HR, payroll systems, as well as employee absences without any limitations on the number of employees.