Speaking
Before you can begin to enjoy our world you need to know how to speak. Simply type <say> hello to say "hello." You can also use an apostrophe in place of the word say, so you can type <'hello> instead. You can <say to <person>> to direct text at a character. You may also <address (person) '(message)> and <(adverb) say to (person) '(message)>.
Other speaking styles are <murmur>, <purr>, <hiss>, <growl>, <mumble> and <mutter>. To be heard in adjacent rooms you would <scream>, <bellow>, <shout>, or <yell>. Note that it is important to follow with the ever important apostrophe. (i.e., loudly shout 'Hello would return You loudly shout, "Hello!")
In addition to the above, there are two methods of speaking privately to another person. You can type <whisper> <person's name> '<message>. This will send the typed text to only the person you whisper to, while others in game will see, "Imari whispers something to Pixalyn."
The second method is only for out of character communications. Type <ooc> <person's name> '<message> to speak to another individual privately and out of character (ooc). Other players will not be able to see you speaking in this manner. This command is especially useful if you are new and wish to ask another player about game mechanics or something else out of genre.
See also the helpfile on Languages for additional information.