Symbian Installation File
Symbian OS is a open source operating system used usually on Smart phones. Symbian OS only runs on ARM processors and is usually found on mobile telephones from Nokia and Sony Ericsson.
When installing applications to Symbian OS a installation script known as a Software Installation Script or SIS is used this is a form of Archive that contains the information and resources needed to install the program.
These files use the .sis extension denoting the file as a installation script and not a application.
How to open .sis files?
Software to open .sis files
What are .sis files