I just finished the title book:
ENIAC in Action
by Thomas Haigh, Mark Priestley and Crispin Rope
©2016, Massachusetts Institute of Technology
This took me more than a month to read this, although (or maybe because), early in my career (mid-1970s) I worked with IBM Mainframe-Computers similar in design to ENIAC. EINIAC was conceptualized during WWII, and was operational from 1945 to 1955. However, it served as a bridge-design between the earlier generation of “experimental” large computers and later large commercial mainframe computers like the IBM System/360 Computers (that I worked with in the mid-70s.)
Also, ENIAC was arguably the first “Supercomputer,” as it was substantially more powerful than any other computer during the earlier parts of its career. It also prompted the development of numerical analysis software in many fields similar to the hydrodynamic-analysis software I used in the mid-70s.
