Wikipedia for some while carried a stub of the following contents (it named as its source the newspaper San Jose Mercury News):

“In 1963 Joan Shogren […] created a computer program that provided the computer with the basic artistic principles needed to create computer-generated art. The first public showing of computer art was held in San Jose, California at San Jose State University on May 6, 1963.“
(source: http://en.wikipedia.org/wiki/Joan_Shogren – meanwhile been deleted from Wikipedia)«

It is, however, still unclear to which extent the event could be called an exhibition of art. Our enquiry to the San Jose Mercury News did, regrettably, not receive a reply. So, the facts about that exhibition and about the artist still remain in the dark.