Douglas Engelbart was an American engineer and inventor, best known for his pioneering work in computer technology. He is most famous for inventing the computer mouse and developing the concept of hypertext, which laid the groundwork for the modern internet. Engelbart's vision was to enhance human intelligence through technology, leading to significant advancements in how we interact with computers. In 1968, Engelbart demonstrated his ideas in what is now known as the Mother of All Demos, showcasing innovations like video conferencing and collaborative software. His work influenced the development of graphical user interfaces and shaped the future of personal computing, making him a key figure in the history of technology.