San Francisco: World renowned computer scientist Larry Tesler (74), the creator of cut, copy and paste & find & replace concepts in computer science passed away. 

Tesler, who breathed his last on Monday, was computer scientist and user interface (UI) guru who is most well-known for creating the seminal computer concepts cut, copy and paste. The innovation and concept of "cut-copy-paste" was pioneered during his time at the Xerox Palo Alto Research Centre in the 1970s.

He was born in 1945 in New York and studied computer science at Stanford. After working in AI research, joined Xerox's Palo Alto Research Center (PARC) in 1973, where he developed cut, copy, and paste.In the following two decades at Apple, he would be deeply involved in the user interface design of the Lisa, Macintosh and Newton, a precursor to the iPhone, reports CNET.

The concepts would later become instrumental user interface building blocks for both text editors and entire computer operating systems (OS).

In 1979, Tesler was assigned to show Apple co-founder Steve Jobs around Xerox PARC, including the tour in which Jobs and a few other Apple employees got to see Xerox's Alto computer in action.

The computer featured icons, windows, folders, a mouse, pop-up menus, WYSIWYG (What You See Is What You Get) text editor, Ethernet-based local networking and network-based printing and games.