![April 22: Mechanical Calculator Designer Schickard Born | This Day in History | Computer History Museum April 22: Mechanical Calculator Designer Schickard Born | This Day in History | Computer History Museum](https://images.computerhistory.org/tdih/22april-1.jpg?w=600)
April 22: Mechanical Calculator Designer Schickard Born | This Day in History | Computer History Museum
![3D illustration of a Mechanical Calculating Device, designed and created by the German Astronomer, Mathematician and Inventor Wilhelm Schickard Stock Photo - Alamy 3D illustration of a Mechanical Calculating Device, designed and created by the German Astronomer, Mathematician and Inventor Wilhelm Schickard Stock Photo - Alamy](https://c8.alamy.com/zooms/6/84dfa9b00a9f4e8b913708477fe0de06/2hef60b.jpg)
3D illustration of a Mechanical Calculating Device, designed and created by the German Astronomer, Mathematician and Inventor Wilhelm Schickard Stock Photo - Alamy
![coins and more: 2943) Wilhelm Schickard (1592–1635), Astronomer, Mathematician, Inventor, Federal Republic of Germany: "400th Anniversary of Wilhelm Schickard's calculator (1623-2023)": A €20 (Twenty Euro) Silver Proof Coin issued by the Munze coins and more: 2943) Wilhelm Schickard (1592–1635), Astronomer, Mathematician, Inventor, Federal Republic of Germany: "400th Anniversary of Wilhelm Schickard's calculator (1623-2023)": A €20 (Twenty Euro) Silver Proof Coin issued by the Munze](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgRvLSvWNdTfGA1jLcNyGozm5Qcvc8upwGyVu9dPEvZHXhBwHJD22QcRZ_rHMefPqZFmRFhSuUxx_AqCzA9TvYwB8Dss4KQR5dBs4mSKzdS8iCDIfagrN4QYkH034rWOmZf7XdILY_KScJBNkDt0RXbLQXL9tIb4GMm5bdRrFK9Mo1uNkSi1fikjUrWkkA/s768/Germany-Schickard-coin-index-768x401.jpg)
coins and more: 2943) Wilhelm Schickard (1592–1635), Astronomer, Mathematician, Inventor, Federal Republic of Germany: "400th Anniversary of Wilhelm Schickard's calculator (1623-2023)": A €20 (Twenty Euro) Silver Proof Coin issued by the Munze
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