Original work
editThese are all diagrams and figures that I created myself.
Original photos
editPictures I've taken myself, that could be of use for relevant articles.
Derivative work
editThese are modifications I made to figures and photos that were already on Wikipedia or Wikimedia Commons.
Free licenses
editMost of these I got from Flickr, and are available under Creative Commons licenses. Some come from the Cambridge Computer Laboratory Archive Photos website (also available under Creative Commons).
Public domain
editThese are in the public domain due to their age or due to being U.S. government works.