In what decade did Douglas Englebart create the Graphical User Interface (GUI)?

Douglas Engelbart was a pioneering computer engineer and inventor credited with laying the groundwork for many elements of modern computing, including the concept of the Graphical User Interface (GUI). His groundbreaking work, particularly demonstrated during the "Mother of All Demos" in 1968, showcased how computers could be used interactively with graphical elements. This demonstration integrated multiple key innovations, such as the mouse, hypertext, and collaborative software, which became foundational to the development of GUIs.

The significance of this development during the 1960s cannot be overstated, as it was during this decade that Engelbart's vision and concepts began to take shape and influence subsequent technologies. Though GUIs became more mainstream in later decades, particularly with the introduction of systems like Apple's Macintosh in the 1980s, Engelbart's early work in the 1960s set the stage for those advancements.