The usual Angela and Mike poses, in front of the Lincoln Memorial and Mt. Vernon.
Part of the eniac accumulator in the Smithsonian Museum of American History. Seeing part of the Eniac was my favorite part of the museum! The eniac was the first stored program electrical digital computer. It is the great, great grandfather of all modern computers. The accumulator did arithmetic and had some storage too. This part of the accumulator measured about 6 feet by 5 feet by 4 feet. In Mom's terminology the eniac was a "warehouse size" computer.
Times have changed. The photomicrograph below shows the entire eniac design produced on one integrated circuit. The accumulator is located in the top center. The actual size of this chip is 7.44 by 5.29 milimeters.
By modern standards, this version of the Eniac is a conservative design. The chip was fabricated in a .5 micron process with just over 100,000 transistors. That means each "wire" in the circuit is .0005 milimeters wide. The PentiumII was fabricated using wires 1/2 the size of the eniac-on-a-chip's wires, and with about 50x more transistors. (Eniac-on-a-chip project).