The world's most famous investor, Warren Buffett has signed up to Twitter and sent his first tweet. When asked if he understood how the site worked he said: "so so". Here's what the 82-year-old tweeted.
His account notched up more than 10,000 followers in the first 10 minutes. Buffett's digital debut came during a live webcast. And he's already received a reply from one of the world's richest people, Microsoft co-founder Bill Gates.