In 1948 Frederic Williams, Tom Kilburn, and Geoff Toothill at the University of Manchester developed the SSEM (Small-Scale Experimental Machine), better known as "Baby". Baby was created to test a new memory system developed by WIlliams and Kilburn called the Williams Tube, the first electronic random access memory for computers. Kilburn ran a program on it on June 21st, the first program to ever run on an electronic stores-program computer.