I remembered this rather nice article about the evolution of the Lua programming language when I mentioned it in a previous post.
It talks quite pleasantly about how Lua got started, how it underwent changes and where it is today. Quite a fascinating read about a language that was born in South America and is today one of the most widely embedded languages inside of video/PC games in the world. Speaking of which, it also makes for a very clear understanding of the difference between an extensible language and an embeddable one.
Worth the read!