Exhibits At the Museum

This Day in History

Today: April 16, 2014
John Mauchly

September 30, 1941

Mauchly writes Atansoff suggesting cooperative work

During the trial to decide who would receive credit for designing the first electronic computer, John Atanasoff's lawyer, Mr. Halladay finally persuaded John Mauchly to confirm several key points.

One such point was that on September 30th, 1941 Mauchly had written to Dr. Atanasoff, co-designer of the Atanasoff-Berry Computer, suggesting a cooperative effort. Mauchly was considering the development of a computer and had asked Atanasoff if he had any objection to the use of his concepts

The judge would eventually rule in favor of Dr. Atanasoff.


September 30, 1988

IBM announces shipment of 3 millionth PS/2 personal computer

The PS/2 was IBM's follow-on computer to its PC and PC/XT and PC/AT machines. The PS/2 used the Micro Channel Architecture, a bus format incompatible with IBM's open ISA standard adopted by clone makers

IBM had introduced its PS/2 machines just the year before, making the 3 1/2-inch floppy disk drive and video graphics array standard for IBM computers and compatibles. PS/2s were the first IBM computers to use Intel's 80386 chip and IBM released a new operating system, OS/2, at the same time, allowing the use of a mouse with IBM computers for the first time.