Title page of the assembly language code that produced Altair BASIC — Developed by Allen, Gates, and Monte Davidoff, with two early Microsoft business cards showing Gates as president and Allen as vice president
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=10631089

Microsoft logo/avatar — 2012–present: Fifth Microsoft logo, introduced on August 23, 2012
Photo Credit: By Microsoft Corporation - Public Domain, https://commons.wikimedia.org/w/index.php?curid=20799781

Bill Gates, 2017 —
Photo Credit: By Kuhlmann /MSC - https://securityconference.org/en/medialibrary/asset/bill-gates-1523-18-02-2017/, CC BY 3.0 de, https://commons.wikimedia.org/w/index.php?curid=100184908

Paul Allen (left) with Bill Gates at Lakeside School in 1970 —
Photo Credit: By Bruce Burgess - Public Domain, https://commons.wikimedia.org/w/index.php?curid=89764229

Paul G. Allen —
Photo Credit: By Miles Harris - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=73641437

An example of an induced nuclear fission event — A neutron is absorbed by the nucleus of a uranium-235 atom, which in turn splits into fast-moving lighter elements (fission products) and free neutrons. Though both reactors and nuclear weapons rely on nuclear chain reactions, the rate of reactions in a reactor is much slower than in a bomb.
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=486924

he Einstein–Szilard letter —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=2679498

FDR response to the Einstein–Szilard letter —
Photo Credit: By Franklin Delano Roosevelt - Public Domain, https://commons.wikimedia.org/w/index.php?curid=2842619

Albert Einstein and Leo Szilar —
Photo Credit: https://www.atomicheritage.org/profile/leo-szilard

Neutron quark structure (ring-shape) —
Photo Credit: By No machine-readable author provided. Harp assumed (based on copyright claims). - No machine-readable source provided. Own work assumed (based on copyright claims)., CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=637381

A schematic diagram of the experiment James Chadwick used to discover the neutron in 1932 — At left, a polonium source was used to irradiate beryllium with alpha particles, which induced a type of uncharged radiation initially thought to be gamma rays. When this radiation struck paraffin wax, protons were ejected with ca. 5.5 MeV kinetic energy. The protons were observed using a small ionization chamber, called a counter, that detected a signal recorded on an oscillograph. Adapted from J. Chadwick, The Existence of a Neutron, Proc. Royal Society London, Series A, 136, 692-708, 1932.
Photo Credit: By Bdushaw - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=63982002