Time and attendance, can be grouped into two categories: electronic/mechanical clocking in machines, these rely on a piece of card which the machine will then print the time/date onto. Some Intelligent machines can remember which card was used, and calculate the time worked between the in and out swipes.
All these machines give an accurate record of when an employee comes to and leaves work.
The second type of time and attendance system is the pc-linked system.
These connect through software to a pc, (usually running windows) these reduce the labour time needed to calculate payroll, as well as being an accurate record for time and attendance.

PC-Linked systems supplied and supported

ActIn Time Premium 2008 Timeware 6 Professional Edition, timeware 6 Small Business Edition, Enterprise Edition, ADT Edition, timeware 5, timeware IV, timeware lite, timeware junior, Wisetime, timestart, timestart junior, timeware stand-alone, timemaster junior, Timevision, ProTime, Payclock EZ, Timelink 2000, Infotime, Auto time premium, Auto time Express, Rota Paylink to link into Sage, Pegasus, Tetra, Quickpay, Bewater, Paxton Pac readers, HID proximity & magnetic readers, Indala proximity and magnetic readers, MR Access magnetic readers, Synel Timelog Junior, Isgus Logic 64