Larry Tesler, a computer scientist who created the terms "cut," "copy," and "paste," has passed away at the age of 74 (17 Feb 2020).

In 1973, Tesler took a job at the Xerox Palo Alto Research Center (PARC) where he worked until 1980. Xerox PARC is famously known for developing the mouse-driven graphical user interface and during his time at the lab Tesler worked with Tim Mott to create a word processor called Gypsy that is best known for coining the terms "cut," "copy," and "paste".

In addition to "cut," "copy," and "paste" terminologies, Tesler was also an advocate for an approach to UI design known as modeless computing. It ensures that user actions remain consistent throughout an operating system's various functions and apps. When they've opened a word processor, for instance, users now just automatically assume that hitting any of the alphanumeric keys on their keyboard will result in that character showing up on-screen at the cursor's insertion point. But there was a time when word processors could be switched between multiple modes where typing on the keyboard would either add characters to a document or alternately allow functional commands to be entered.