### Zulip
-[Zulip](https://zulipchat.com/zephyr) ([source code](https://github.com/zulip/zulip)) is a web-based Zephyr client that also provides [mobile apps](https://zephyr.zulipchat.com/apps) for Android and iOS and desktop apps for Linux, Mac, and Windows. Zulip is developed by a company composed largely of MIT alums and SIPB members.
+[Zulip](https://zulipchat.com/zephyr) ([source code](https://github.com/zulip/zulip)) is a web-based Zephyr client that also provides [mobile apps](https://zephyr.zulipchat.com/apps) for Android and iOS and desktop apps for Linux, Mac, and Windows. Zulip was originally a proprietary product developed by a company composed largely of MIT alums and SIPB members. It was acquired by [Dropbox](https://www.dropbox.com/about) in 2014, and [released as open-source software](https://blogs.dropbox.com/tech/2015/09/open-sourcing-zulip-a-dropbox-hack-week-project/) a year later. The Zulip for Zephyr service is offered by [Tim Abbott](http://web.mit.edu/tabbott/www/) (MIT '06, SIPB member)'s Kandra Labs.
+
Zulip, like Roost, is easy to set up because it uses Webathena for authentication.
See [Zulip for MIT setup](http://zulipchat.com/zephyr) for details.
> 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 zephyrgram to `-c hello -i YOUR_USERNAME` to let people
+> know you're a zephyr user! Don't be afraid to subscribe to the personal classes
+> of anyone who responds. In the same way, greet anyone who says
+> hello, and sub to their 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
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