What is Twitter?
Twitter is a microblogging platform which invites you to share what you're doing with the world - in 140 characters or less. These short messages are called "tweets".
It also allows you to keep track of what other people are doing as well, either by monitoring their Twitter updates online, or - in some countries - by receiving updates directly to your phone in the form of SMS text messages.
How can I see my Digital Planet tweets on Open2?
If you'd like to share your thoughts on Digital Planet with other listeners - and for them to be included in the stream of messages displayed here - you need to add a 'hash' to your message - #digitalplanet - to ensure it gets included in the feed.
If you don't have a Twitter account, you can sign up for one. It's currently free.
Messages published in the Twitter stream are by individual Twitter users and The BBC and The Open University are not responsible for the content of them.