Exhibits At the Museum

This Day in History

Today: May 28, 2016
Clifford Shaw

November 7, 1960

RAND's JOSS Operating System Begins

The Johnniac Open Shop System (JOSS) conversational timesharing service begins on the Rand Corporation’s Johnniac computer. Mathematician Cliff Shaw developed JOSS to bring users back into contact with the machine to do online debugging and program development. Before timesharing was created, batch turn-around times impeded the solution of many problems as programmers ('coders') submitted punch cards to computer operators and waited for their results—sometimes for days.