Common place to store images that are likely to be shared across pages.
Icons - Generic icons like arrows, calendars, "New" balloons and so on.
Logos - Logos for specific organizations, events, programs, etc.
Screenshots - Galaxy screenshots used in this web site.
ScreencastFrame - Supplemental graphics used for tutorials and quickies.
Photos - Photographs.
NGS101 - Graphics used in NGS 101 tutorial page.