How can I know the different version?

[babeo]

Hi all

I use "uname -a" to find the version of SUN OS, but when I read some books and hear different things from people. I confuse. What is the different of:
SunOS 5.6
SunOS 5.8
Solaris 8, 6, 7
Solaris 2.6, 2.7, 2.8
..... and more ?
Which is what? and why the names are different? I remember once my instructor says it is commercial name and it is version name, blah blah... forget what he said !!
thanks

 

[jimbopalmer]

SunOS 5.x is Solaris 2.x but frequently only the x part is mentioned.

so SunOS 5.7 is Solaris 2.7 but is just called Solaris 7 The one thing you can't give for your heart's desire is your heart. - Lois McMaster Bujold

 

[babeo]

Thanks.