The former site of the General Letter Office in London —
Photo Credit: By KGGucwa - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=8926214

GPO logo — First logo 1937–1950
Photo Credit: By Leapcake123 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=120957589

Colossus computer — Colossus 10 with its extended bedstead in Block H at Bletchley Park in the space now containing the Tunny gallery of The National Museum of Computing
Photo Credit: By Good, Jack; Michie, Donald; Timms, Geoffrey (1945), General Report on Tunny: With Emphasis on Statistical Methods, UK Public Record Office HW 25/4 and HW 25/5 - Public Domain, https://commons.wikimedia.org/w/index.php?curid=52298957

cover of The Celestine Prophecy — First edition
Photo Credit: By Derived from a digital capture (photo/scan) of the book cover Fair use, https://en.wikipedia.org/w/index.php?curid=2225322

Samford Hall, Auburn University —
Photo Credit: By Autiger at English Wikipedia, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=2907147

logo for Auburn University —
Photo Credit: By http://www.auburn.edu/communications_marketing/styleguide/styleguide.pdf, Fair use, https://en.wikipedia.org/w/index.php?curid=22253663

James Redfield —
Photo Credit: https://www.celestinevision.com/read-our-story/james-redfield/

Cover of agreement between the UN and ITU —
Photo Credit: ITU - https://www.itu.int/en/history/Pages/ITUsHistory-page-3.aspx

Delegates at the first International Telegraph Conference (Paris, 1865) —
Photo Credit: ITU - Public Domain - https://www.itu.int/en/history/ImagesConferences/1865-781775-no-caption.jpg

Logo for the United Nations International Telecommunication Union —
Photo Credit: By United Nations - Public Domain, https://commons.wikimedia.org/w/index.php?curid=85189011

Papal Bull anulling Magna Carta — Bulla Innocentii Papae III. pro rege Johanne, contra barones. (In membr.) 1216. 151.
Photo Credit: https://www.bl.uk/collection-items/the-papal-bull-annulling-magna-carta - Public Domain