このサイトの昔の道具の写真は、ウィキメディア・コモンズで公開されている、自由に使える写真(パブリックドメイン・CC0)を、ファミコン風のドット絵に加工したものです。トップの時計の動画も同じように加工しています。白熱電球と台帳の2点は、写真をもとに描き起こしたドット絵です。
- Vintage black typewriter (Unsplash).jpg(CC0)
https://commons.wikimedia.org/wiki/File:Vintage_black_typewriter_(Unsplash).jpg - Vintage watch and typewriter (Unsplash).jpg(CC0)
https://commons.wikimedia.org/wiki/File:Vintage_watch_and_typewriter_(Unsplash).jpg - JBER telephone operators connect calls, people 120124-A-ZY202-001.jpg(Public domain)
https://commons.wikimedia.org/wiki/File:JBER_telephone_operators_connect_calls,_people_120124-A-ZY202-001.jpg - Glen Beck and Betty Snyder program the ENIAC in building 328 at the Ballistic Research Laboratory.jpg(Public domain)
https://commons.wikimedia.org/wiki/File:Glen_Beck_and_Betty_Snyder_program_the_ENIAC_in_building_328_at_the_Ballistic_Research_Laboratory.jpg - Blue-punch-card-front-horiz.png(Public domain)
https://commons.wikimedia.org/wiki/File:Blue-punch-card-front-horiz.png - Wooden Card Catalog Furniture.jpg(CC0)
https://commons.wikimedia.org/wiki/File:Wooden_Card_Catalog_Furniture.jpg - Abacus Kit.jpg(CC0)
https://commons.wikimedia.org/wiki/File:Abacus_Kit.jpg - Clock, pocket watch (3).jpg(CC0)
https://commons.wikimedia.org/wiki/File:Clock,_pocket_watch_(3).jpg - Patterson's General Store Ledger - DPLA - 0079e562a497df98da2b2bf6a5740d22 (page 703).jpg(Public domain)
https://commons.wikimedia.org/wiki/File:Patterson%27s_General_Store_Ledger_-_DPLA_-_0079e562a497df98da2b2bf6a5740d22_(page_703).jpg - Automatic Electric AE 1A, 1925-1950s - Telephone Museum - Waltham, Massachusetts -DSC08190.jpg(CC0)
https://commons.wikimedia.org/wiki/File:Automatic_Electric_AE_1A,_1925-1950s_-_Telephone_Museum_-_Waltham,_Massachusetts_-DSC08190.jpg - Chess game Staunton No. 6 perfil view 8.jpg(CC0)
https://commons.wikimedia.org/wiki/File:Chess_game_Staunton_No._6_perfil_view_8.jpg - The Edison Incandescent Lamp detached from and screwed in socket.jpg(Public domain)
https://commons.wikimedia.org/wiki/File:The_Edison_Incandescent_Lamp_detached_from_and_screwed_in_socket.jpg