Dr. Douglas C. Engelbart (born January 30, 1925) is an American inventor. He is best known for inventing the computer mouse (in a joint effort with Bill English); as a pioneer of human-computer interaction whose team developed hypertext, networked computers, and precursors to GUIs; and as a committed and vocal proponent of the development and use of computers and networks to help cope with the world’s increasingly urgent and complex problems.