Zephyr is an underlying chat system; the built-in tools for exchanging messages via Zephyr are rudimentary. Most people who use Zephyr today take advantage of integrated clients that make the system easy to use.
+Here are [detailed instructions for getting onto Zephyr.](https://sipb.mit.edu/doc/zephyr-quick/)
+
## Major clients
Here are some of the primary clients used at MIT. There's also a listing of [other Zephyr clients](http://zephyr.1ts.org/wiki/ZephyrClients), but their use is generally not recommended.
> report what one is working on or up to, or ask friends questions, or
> just rant about something.
+<strong>hello</strong>:
+> -c hello is for introducing yourself to the Zephyrsphere!
+> Send a zephyr to `-c hello -i YOUR_USERNAME` to let people
+> know you're a Zephyr user! This is a way to find out who else you know
+> uses Zephyr so you can subscribe to their class, and to get to know
+> new people through Zephyr. Also, feel free to invite others to
+> subscribe to your class!
+
<strong>unclasses</strong>:
> Most classes have an unclass, formed by prefixing "un" to the name. For
> example, -c help has the unclass -c unhelp. The unclass is generally used for
> linking to the original source for reasons of privacy or discretion. "eiz"
> means "Elsewhere in Zephyr", "eip" means "Elsewhere in Personals".
+<strong>eiw</strong>:
+> "Elsewhere in Webspace": instance used to comment on events on the Internet beyond Zephyr (like, say, on another messaging service).
+
<strong>eim</strong>:
> "Elsewhere in Meatspace": instance used to comment on events not on Zephyr.