Twitter is a service for friends, family, and co–workers to communicate and stay connected through the exchange of quick, frequent answers to one simple question: What are you doing?

Twitter is a way of life. It's living with a publicity policy. It's friends, Romans and country people the world over engaged in timely snippet conversations that fit into 140 character chunks.

Go sign up and see what this is all about.

• Official Twitterness: Blog, Help Docs, API documentation