Draft:List of Danish inventors and discoverers

• Lego-Lego is a line of plastic construction toys manufactured by the Lego Group, a privately held company based in Billund, Denmark. It was founded by Ole Kirk Christiansen, a carpenter from Billund, Denmark, who began making wooden toys in 1932.{{Cite web |last=Thorø |first=Marianne |date=2018-12-06 |title=LEGO-løverne har forladt Billund |url=https://billundonline.dk/lego-loeverne-har-forladt-billund/ |access-date=2023-11-28 |website=Billundonline.dk - Nyheden når den er ny - fra hele Billund kommune |language=da-DK}} By 1930, Christiansen employed a small workforce to maintain his growing business.{{Cite book |last=Herman |first=Sarah |url=https://www.amazon.co.uk/Building-History-Group-Sarah-Herman-ebook/dp/B00E8HPN12 |title=Building a History: The Lego Group |publisher=Pen & Sword Books Ltd |year=2012 |location=Barnsley, South Yorkshire |access-date=15 January 2021 |archive-date=27 February 2023 |archive-url=https://web.archive.org/web/20230227104629/https://www.amazon.co.uk/Building-History-Group-Sarah-Herman-ebook/dp/B00E8HPN12 |url-status=live }}

• Tychonic system- Tychonic system is a model of the universe published by Tycho Brahe in 1588, which describes earth as the centre of the universe and planets revolve around the sun intern revolves around the earth."The Tychonic system is, in fact, precisely equivalent mathematically to Copernicus' system." (p. 202) and "[T]he Tychonic system is transformed to the Copernican system simply by holding the sun fixed instead of the earth. The relative motions of the planets are the same in both systems ..." (p. 204), Kuhn, Thomas S. , The Copernican Revolution (Harvard University Press, 1957).

• Gram stain-It is a method of staining used to classify bacteria species which was developed by Danish bacteriologist Hans Christian Gram .{{cite web |title=Gram Stain: MedlinePlus Medical Test |url=https://medlineplus.gov/lab-tests/gram-stain/#:~:text=What%20is%20it%20used%20for,used%20to%20diagnose%20fungal%20infections. |website=medlineplus.gov |language=en}} {{cite journal |last=Colco |first=R. |title=Gram Staining |journal=Current Protocols in Microbiology |date=2005 |volume=Appendix 3 |issue=1 |pages=Appendix 3C |doi=10.1002/9780471729259.mca03cs00 |pmid=18770544 |isbn=978-0471729259 |s2cid=32452815 }}
• Parotid duct- Parotid duct was first described by Nicolas Steno.

• Speed of light- Ole Christensen Rømer was a Danish astronomer , first demonstrated that light travels at a finite speed.{{Cite journal |last=van Helden |first=Albert |date=1983 |title=Roemer's Speed of Light |url=https://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1983JHA....14..137V&db_key=AST&page_ind=0&plate_select=NO&data_type=GIF&type=SCREEN_GIF&classic=YES |journal=Journal for the History of Astronomy |language=en |volume=14 |issue=2 |pages=137–141 |doi= 10.1177/002182868301400206|bibcode=1983JHA....14..137V |issn=}}

• Magnetic Feild-The concept that electric current creates magnetic field was proposed by Hans Christian Ørsted..{{cite web |last1=Jacobsen |first1=A. S. |last2=Knudsen |first2=O. |title=H.C. Ørsted |url=https://denstoredanske.lex.dk/H.C._%C3%98rsted |website=Den Store Danske |publisher=Gyldendal |language=da |date=14 April 2021 |access-date=12 April 2023}}

• Bohr model- Developed by Niels Bohr.{{Cite web |date=2025-02-14 |title=Bohr model {{!}} Description, Hydrogen, Development, & Facts {{!}} Britannica |url=https://www.britannica.com/science/Bohr-model |access-date=2025-02-18 |website=www.britannica.com |language=en}}
• Bohr–Van Leeuwen theorem-proposed by Neils Bohr it states that when statistical mechanics and classical mechanics are applied consistently, the thermal average of the magnetization is always zero.{{Cite journal|last1=Alicki|first1=Robert|last2=Jenkins|first2=Alejandro|date=2020-10-30|title=Quantum Theory of Triboelectricity|url=https://link.aps.org/doi/10.1103/PhysRevLett.125.186101|journal=Physical Review Letters|language=en|volume=125|issue=18|pages=186101|doi=10.1103/PhysRevLett.125.186101|pmid=33196235|issn=0031-9007|arxiv=1904.11997|bibcode=2020PhRvL.125r6101A|hdl=10669/82347 |s2cid=139102854}}

• Thermometer-modern thermometer showing the temperature between two fixed points was invented by Ole Rømer.

• C++-C++ is a high-level, programming language created by Danish computer scientist Bjarne Stroustrup.{{Cite book |last=Stroustrup |first=Bjarne |author-link=Bjarne Stroustrup |title=The C++ Programming Language |year=1997 |edition=Third |chapter=1 |publisher=Addison-Wesley |isbn=0-201-88954-4 |oclc=59193992 |url=https://archive.org/details/cprogramminglang00stro_0 }}

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