Does WotLK have class specializations?

Hello everyone, thanks for taking your time to read this.

I'm fairly new to WoW and Warmane, and reading a guide posted here on the forums I came across class specializations which seems like fun.

My question is, does WotLK have specializations or are they introduced in later expansions? If there are specs in WotLK, how do I choose one?

Thanks once again!

Every class has 3 specializations(or more!), you choose one by putting talent points into one you like, usually reaching last talent, but there are exceptions.

Btw specializations are in WoW since its first day.