Douglas Englebart's demo - too many innovations to list, but includes real time collaboration (he demoed in a convention center while the system ran 30 miles away in his lab, connected by a leased line operating at 1200 baud!). People think he just invented the mouse, but the overarching theme in his work was augmenting human capabilities... http://dougengelbart.org/firsts/dougs-1968-demo.html
Ivan Sutherland's Sketchpad demo - Object oriented graphics using a constraint based system (https://www.youtube.com/watch?v=6orsmFndx_o)
Douglas Englebart's demo - too many innovations to list, but includes real time collaboration (he demoed in a convention center while the system ran 30 miles away in his lab, connected by a leased line operating at 1200 baud!). People think he just invented the mouse, but the overarching theme in his work was augmenting human capabilities... http://dougengelbart.org/firsts/dougs-1968-demo.html