What familiar device was invented by human-computer interface engineer Douglas Engelbart, creator of hypertext?
Purple Numbers Purple Numbers is a suite of tools that allows one to address paragraphs of HTML content. It was originally conceived by Douglas Engelbart for his creation of hypertext. The name comes from the faint, purple numbers at the end of each paragraph, which represent the link to that paragraph. The name was coined by Christina Engelbart, Doug's daughter.
Jane (software) Jane 128 was a GUI-based integrated software package for the Commodore 64 and Commodore 128 personal computers. It was developed by Arktronics and published by Commodore International in 1985. Like Commodore's earlier Magic Desk software, it used a literal desktop metaphor with the interface consisting of an onscreen graphic of a desktop with icons representing associated business tools - a typewriter represented the word processor component (called JaneWrite), a filing cabinet the database (JaneList) and so on. It was designed to be controlled by either a joystick or a mouse. Like most of the other examples of integrated software for home computers, Jane's components were criticized for being slow and limited It was not a success in the marketplace but represented an early example of a graphical interface on an 8-bit computer.