Attributions
- "500px-Xmas tree animated" by Guam (https://commons.wikimedia.org/wiki/User:Hartwin_Wolf/Gallery:Wintertime#/media/File:500px-Xmas_tree_animated.gif) -- Licensed by CC0 Public Domain (https://creativecommons.org/publicdomain/zero/1.0/deed.en)
- "Google-apps-ne-besplaten" by Valentyna Sagan (https://commons.wikimedia.org/wiki/File:Google-apps-ne-besplaten.jpg) -- Licensed by Creative Commons Attribution 3.0 Unported (https://creativecommons.org/licenses/by-sa/3.0/deed.en)
- "In North American's modern machine shop, another aircraft part is finished on a huge turret lathe, North American- Aviation, Inc, Inglewood, Calif" by Alfred T. Palmer (https://commons.wikimedia.org/wiki/File:In_North_American%27s_modern_machine_shop,_another_aircraft_part_is_finished_on_a_huge_turret_lathe,_North_American-_Aviation,_Inc,_Inglewood,_Calif.jpg) -- Licensed by CC0 Public Domain (https://creativecommons.org/publicdomain/zero/1.0/deed.en)
- "Internet1" by Kulandru mor (https://commons.wikimedia.org/wiki/File:Internet1.svg) -- Licensed by CC0 Public Domain (https://creativecommons.org/publicdomain/zero/1.0/deed.en)