In July 1946, Freddie Williams of Telecommunications Research Establishment was performing a series of experiments on storage of the cathode ray tube and thus formed the William tube memory. Almost instantly, Newman and Patrick Blackett of Manchester University appointed Williams in the post of Electro technics at Manchester, with the aim of utilizing electronic technology to build a stored-program, general-purpose computer. Williams was soon joined by Tom Kilburn, his former assistant and together they fathered the "Manchester Baby".
Manchester Baby was the earliest stored-program, general-purpose, electronic digital computer to work. The program that ran the computer was only 17inches long and was stored on the face of a cathode ray tube. Later, a much larger version was released in the market, with its programming system designed by Turing. This enlarged version, Ferranti Mark I was world's first commercially available computer and about ten pieces were sold.