What is the true meaning of OOP?

Enlighten me, what is the true essence of OOP? Is is just the use of objects and classes, or is it something more?

and is OOP really better than structured programming?

>Enlighten me, what is the true essence of OOP?
Wank and managerspeak

>Is is just the use of objects and classes, or is it something more?
It's the use of backronyms and other nonsense that makes the speaker sound important.

>and is OOP really better than structured programming?

I suppose, if you're the type who likes Java. The rest of us just want to get our work done.