The MISO Sequence Ontology Browser

Search for a SO term by entering a SO term name or synonym in the query box above;
Explore the structure of SO and browse for SO terms using the expandable, cascading tree on the left;
Go to the detail page for a term where you can:

Get details about a term, it's definition and relationships;
See graphical views of a term's place in the ontology and link to it's neighbors;
Export details about a term in a variety of formats;
And access and contribute detailed documentation about a term and it's history by linking through to the SO wiki