The hulking computer of 1945 - ENIAC

I had reason to search for hulking computers, and these two interesting articles came up:

Around the end of the second world war at the University of Pensylvania, a group of six women were being introduced to the ENIAC — a machine designed to calculate ballistics trajectories. Plucked from pools of manual computers, they were tasked to operate the hulking giant. The women jumped at the chance, since the only other career options open to a woman with a technical mind were teaching or doing calculations for insurance companies.

These women were at the forefront of computer science, and arguably invented the practice of modern software engineering.

Kay McNulty invented the subroutine in order to increase the computing capability of the ENIAC. Betty Holberton invented the first generator program (a program that creates another program), the SORT-MERGE generator. Betty also invented breakpoints, specifying a point at which the computer should pause so that the programmer can inspect the state of the program to find a bug.

In December 1945, a secret sat behind a heavy door at the University of Pennsylvania’s Moore School of Electrical Engineering. Eighty feet long, made of hulking black metal, and weighing 30 tons, "it was just a monstrous thing,” recalled Betty Snyder Holberton a half century later. She and five other young mathematicians, Kathleen McNulty (later Mauchly Antonelli), Jean Jennings (Bartik), Marlyn Wescoff (Meltzer), Frances Bilas (Spence), and Ruth Lichterman (Teitelbaum), were the secret’s keepers, tasked with figuring out how it ticked and putting it to use.

Perhaps see also previously

2 Likes

It was in Volume XX ,Book of Knowledge - The Children’s Encyclopedia
1949. The first computer I read about, down on the Farm, until the mid 70’s.
ENIAC02
Weighing in at 30 tons, this massive computer fills a 1,500-square-foot room. Its 40 cabinets, each of them nine feet high, are packed with 18,000 vacuum tubes, 6,000 switches and 1,500 relays will be solving problems for US Armed Services in the near future