The History of Plato's Dialogues

Alex Castellanos: How many of Plato's dialogues do we know about? Do they have a beginning and ending point? Are they sequenced thematically or are they chronologically? And then just the dialogues as a whole taken together, do they have a Beginning and Ending Point?Castellanos: Can you guys give me kind of this content and the sequence a little bit of the history for our readers, the listeners?