WordPress have multi-account?

Hello. This is probably a really “noobish” question to ask but i couldn’t get a straight answer just by searching it. Hehe.

But anyway, i’m wondering if WordPress has a multi-account plugin that allows registration so other people may post their own blogs. Such as a website like Tumblr or Xanga where people register so they are able to post their own blogs and such. It’s something i’ve always been wondering about WordPress.

Thanks in advance. =)