In 1940 John W. Mauchly met with John V. Atanasoff, who had recently introduced the Atanasoff- Berry Computer (ABC). Atanasoff demonstrated the ABC to Mauchly, who later implemented some of Atanasoff's ideas as he designed the ENIAC. Because Atanasoff's work had not yet been granted patent protection, the ENIAC received early recognition as the world's first electronic digital computer. Later on, Mauchly's reputation as a major contributor to the ENIAC's successor, EDVAC, would be undercut by the publication of a report by John von Neumann, who received credit for the design of the first stored-program computer.