Nokia PC Suite is a software package used to establish an interface between Nokia mobile devices and computers that run Microsoft Windows operating system. It can be used to transfer music, photos and applications. It can also be used to send Short Message Service (SMS) messages or act as a modem to connect the computer to the Internet. A mobile phone can be connected by USB, Bluetooth, or infrared. Nokia PC Suite is proprietary software and is required to access certain aspects of Nokia handsets.