- Most installers for Microsoft Windows are in the format of .exe. However, mobile devices primarily operate on the Symbian system, which gives way to the .SIS file extension. This is used to install applications on a variety of devices manufactured by Palm, Motorola and Nokia.
- The easiest way to open SIS files is to transfer them to a suitable mobile device. If one is not available there are a few different programs that can be used. Palm OS Emulator can be used for both Windows and Macs. Individuals using Windows have a few additional options including UnSIS, Easy SIS Creator and Nokia PC Suite.
- Another location where .SIS files may be found is through the Steam gaming software. These specific files are used to create backups of saved data and to relay which games have previously by downloaded.
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