Operating system for kiosks

What is the recommended operating system for a kiosk?

Our kiosks can be operated under all currently available Linux or Windows software.

For kiosk based solutions:

You can use any operating systems (Linux, Windows, MAC OS) for the PC-based kiosks, but also can build with uniqe developed AVR-based circuits or PLC-s or combined.

For our internet terminals:

The built in timing is not based on the operating system so works with all software.
Both operating systems can be programmed in kiosk mode, that means that the user only can use the kiosk what is intended for. The kiosk cannot be used for hacker or cracker activity, and the kiosk mode will also stop viruses infecting the terminal.