ios versions P T XE ??? [7:2066]

please let me know about the IOS release versions eg, what exactly would the following mean ? i need to decipher the P ,T ,XE stuff. 11.2(11)P and above 11.(3)3T and above 12.0, 12.0(1)T - 12.0(4)T, 12.0(4)XE thanks __ Do You Yahoo!? Yahoo!

Re: ios versions P T XE ??? [7:2066]

I'm not too sure about the P release, but I think it implies some additional features. The T (technology) release supports a greater range of hardware than the mainline release. Consequently, it is released later than the main release because there is more code involved and more bugs to fix.