I am the author of this picture, I took it of my bigtrak (popular toy from the 1980's) keypad. I release all rights to this picture and release it into the public domain.
No machine-readable author provided. <a href="//commons.wikimedia.org/w/index.php?title=User:Conway71~commonswiki&amp;action=edit&amp;redlink=1" class="new" title="User:Conway71~commonswiki (page does not exist)">Conway71~commonswiki</a> assumed (based on copyright claims).
No machine-readable source provided. Own work assumed (based on copyright claims).