Is my computer compatible?

To answer that question, see the Computer Compatibility List here on Land of the Leaves (or the original on the Haiku forum). And, Haiku also has their own official info page that you can visit as well by clicking this link.

A page was also available on Haikuware. If the site is offline, try using the Internet Archive. A list for BeOS pre-dates this one, which can be found by searching the web as well.