Flickdeck visual deck artwork — sources and licenses ==================================================== World flags ----------- The World flags deck uses SVG artwork from country-flags: https://github.com/hampusborgos/country-flags The source project dedicates the flag images to the public domain. The images were rasterized to PNG and embedded in the .flickdeck file. Country and territory names and coverage follow LearnStuff's geography quiz: https://learnstuff.page/geoquiz/ World capitals -------------- Country and territory names and the baseline capital data follow LearnStuff's geography quiz. Capital answers were reviewed on 12 July 2026. Special cases identify constitutional, administrative, legislative, royal, claimed, or de facto seats where a single unqualified city would be misleading. Equatorial Guinea's answer reflects the 2 January 2026 decree naming Ciudad de la Paz as the national capital: https://www.guineaecuatorialpress.com/noticias/el_presidente_de_la_republica_proclama_la_ciudad_de_la_paz_como_capital_de_la_republica_de_guinea_ecuatorial_con_la_firma_de_un_decreto_ley South Africa's three-capital answer follows the South African Government: https://www.gov.za/about-sa/south-africas-provinces The constellations ------------------ The constellation images were generated by LearnStuff from these sources: 1. HYG Database v4.1, Astronexus https://github.com/astronexus/HYG-Database Licensed under Creative Commons Attribution-ShareAlike 4.0 International: https://creativecommons.org/licenses/by-sa/4.0/ 2. d3-celestial, Copyright (c) 2015 Olaf Frohn https://github.com/ofrohn/d3-celestial Licensed under the BSD 3-Clause License, reproduced below. Modifications: HYG star positions and magnitudes were combined with d3-celestial constellation names and figure lines, projected into an individual field for each of the 88 IAU constellations, styled with glow and line effects, placed on a dark background, and rasterized to PNG for Flickdeck. The resulting constellation deck artwork is distributed under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0). International Morse code ------------------------ The character patterns and signal-length ratios follow Recommendation ITU-R M.1677-1, International Morse code (in force): https://www.itu.int/rec/R-REC-M.1677-1-200910-I/ The recordings are original, programmatically generated audio: a 650 Hz tone at 12 words per minute, with a dash three times the length of a dot and one dot of silence between elements of a character. No third-party recordings are used. Major bones and skeletal structures ----------------------------------- The anatomy plate artwork and learning notes are original to LearnStuff's anatomy project: https://learnstuff.page/anatomy/ The Flickdeck generator selects each structure's anterior or posterior plate, highlights it in teal, mutes the surrounding bones for context, and applies a structure-specific crop for phone-sized review. No third-party anatomy artwork is embedded in the deck. Terminology was checked against the International Federation of Associations of Anatomists' Terminologia Anatomica: https://ifaa.unifr.ch/ The axial and appendicular divisions and regional descriptions were checked against OpenStax Anatomy and Physiology 2e: https://openstax.org/books/anatomy-and-physiology-2e/pages/7-1-divisions-of-the-skeletal-system BSD 3-Clause License for d3-celestial ------------------------------------- Copyright (c) 2015, Olaf Frohn All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.