Symbian^3 is the latest Symbian OS release, and it is a continuation of the S60 platform. However the S60 brand is no longer used, and Series 80 disappeared long time ago. Even ^3 is no longer used by Nokia, in the future they will simply call the OS Symbian.
...apply it to? like s60? s80? I have purchased a new nokia n8 and now I am after it's software, but it's hard to find anything for it as I don't even know it's OS category.. like s69 or s80 or any other..