What familiar device was invented by human-computer interface engineer Douglas Engelbart, creator of hypertext?
Douglas Engelbart Douglas Carl Engelbart (January 30, 1925 – July 2, 2013) was an American engineer and inventor, and an early computer and Internet pioneer. He is best known for his work on founding the field of human–computer interaction, particularly while at his Augmentation Research Center Lab in SRI International, which resulted in creation of the computer mouse, and the development of hypertext, networked computers, and precursors to graphical user interfaces. These were demonstrated at The Mother of All Demos in 1968. Engelbart's Law, the observation that the intrinsic rate of human performance is exponential, is named after him.
Openbook (website) Openbook was a Facebook-specific search engine, built upon Facebook's publicly available API, which enabled one to search for specific texts on the walls of Facebook subscribers "en masse" which they had denoted, knowingly or unknowingly, as being available to "Everyone," i.e. to the Internet at large. Both an avowed parody of Facebook and an Internet privacy advocacy website, it was built by San Francisco website developers Will Moffat, Peter Burns and James Home within a few hours on May 12, 2010, and received nearly six million page views in its first two weeks on-line from over a million people in over two hundred countries. The website received extensive media attention from, among others, the Wall Street Journal, NPR and ABC News, including international coverage.