More than 10 million computers are in use in the United States ** Domain Name System (DNS):** is pioneered by Jon Postel, Paul Mockapetris and Craig Partridge. Seven 'top-level' domain names are initially introduced: edu, com, gov, mil, net, org and int. Microsoft Windows: is introduced eliminating the need for a user to have to type each command, like MS-DOS, by using a mouse to navigate through drop-down menus, tabs and icons

1983

https://www.computerhistory.org/internethistory/1970s/