David Hilbert, 1907 — American Journal of Mathematics Photo Credit: By Unknown author - [Photograph]: David Hilbert. (1907). American Journal of Mathematics, 29(1). Retrieved from https://www.jstor.org/stable/2369910, Public Domain, https://commons.wikimedia.org/w/index.php?curid=56279447
Original IBM Personal Computer motherboard — Photo Credit: By German - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=18645781
IBM Personal Computer —
On display at the Musée Bolo, EPFL, Lausanne Photo Credit: By Rama & Musée Bolo - File:IBM_PC-IMG_7271.jpg, CC BY-SA 2.0 fr, https://commons.wikimedia.org/w/index.php?curid=94784371
.25-inch floppy disks holding a very early version of Linux — Photo Credit: By Shermozle at English Wikipedia, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=11478957
penguin Tux, the Linux Mascot — Photo Credit: By Larry Ewing, Simon Budig, Garrett LeSage - https://isc.tamu.edu/~lewing/linux/, http://www.home.unix-ag.org/simon/penguin/, garrett/Tux on GitHub, CC0, https://commons.wikimedia.org/w/index.php?curid=753970
Bell System logo (called the Blue Bell) used from 1889 to 1916 — Photo Credit: By AT&T - http://www.porticus.org/Transferred from en.wikipedia by SreeBot, Public Domain, https://commons.wikimedia.org/w/index.php?curid=17836546
Some data flows and storage levels in the Git revision control system — Photo Credit: By Daniel Kinzler - Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=25223536