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.
Data Toolbar Data Toolbar is a Web scraping computer software add-on to the Internet Explorer, Mozilla Firefox, and Google Chrome Web browsers that collects and converts structured data from Web pages into a tabular format that can be loaded into a spreadsheet or database management program.