A message without an instance specified will default to the instance \93personal\94.
+Some common classes include:
+
+'''help'''::
+ -c help is a class for asking (and answering) questions on virtually any topic imaginable. Be sure to use an instance (such as \93linux\94, \93barnowl\94, \93campus\94, or so on) when asking questions, since it's a fairly high-traffic class.
+
+'''sipb'''::
+ -c sipb is where most SIPB members hang out. It's a place for technical discussion, questions, support, and organizing SIPB events or projects. You should also always use an instance when sending to -c sipb.
+
+'''Personal Classes'''::
+ By convention, nearly every Zephyr user has a "personal" class that is the same as their username. How this class is used varies from person to person, but it's often a sort of mini-blog, a place to report what one is working on or up to, or ask friends questions, or just rant about something.
+
+'''"un" Classes'''::
+ Many people use "un" classes in addition to their personal class, for example {{{johndoe}}} might use {{{-c unjohndoe}}}. Sometimes there are nested un-classes as well, such as {{{-c ununjohndoe}}} or {{{-c unununjohndoe}}}. It is extremely rare to see anything more than three "un"s. Un-classes are generally used for snarking about a conversation going on in the next class up ({{{-c unjohndoe}}} snarking about {{{-c johndoe}}}), or for more intense ranting. The more "un"s, the more intense the snarking/ranting generally becomes.
+
+=== Zephyr Slang ===
+
+If you spend enough time on Zephyr, you'll begin noticing some strange phrases and words being thrown around. Some of these include:
+
+'''i,i foo''': originated from CMU and means "I have no point here, I just like to say". Sometimes people simply use quotes: {{{"foo"}}}
+
+'''mix''': If somebody accidentally sends a Zephyr to the wrong class or person, they will send another Zephyr to that wrong/class person simply saying "mix". This basically just means, "oops, sorry, I didn't mean to send that Zephyr here". You might also see "-i mix", which is the same thing, only with instances.
+
+'''.d''': You may see an instance change from {{{-i foo}}} to {{{-i foo.d}}}. This indicates a deviation or tangent from the the original topic.
+
+'''ttants''': Literally, "Things That Are Not The Same".
+
+'''prnf''': Literally, "Pseudo-Random Neuron Firings".
+
+There are many other acronyms that are used; if you don't know what it means, try using the {{{whats foo}}} command at an Athena terminal.
+
=== Colors ===
=== Filters ===
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