To speak to some one privately, you can use the page command:
page Zakhayelos=I have a question
You paged Zakhayelos with: I have a question
Most out of character, or OOC, communication is handled on the channel system. There are a variety of channels. But the most basic and useful is the OOC channel.
To Join the OOC channel:
You will then automatically receive the messages on the OOC channel.
To speak on the OOC channel:
+OOC Say something!
<OOC> Michael says, "Say something!"
speak on Local OOC: