| ABA | to | Addiator Perplex |
| Addiator Piccolo | to | Addo-X 7341-60 |
| Addo-X 80 E | to | American Digest 1924 |
| American Machinist | to | Aristo Streckenzugtafel 1780 |
| ArithMachine Material | to | A Brief Introduction of Chinese Mechanical Calculator |
| Babbage, Charles | to | Baum Additionsmaschine |
| Baum Anleitung | to | Blater 1887 |
| Blater 1888 | to | Briggs 1631b |
| Briggs 1760 | to | Brunsviga MJ, MJI |
| Brunsviga MJR | to | Caillet 1858 |
| Cajori 1909 | to | Ciermans |
| Cieslik 1981 | to | Contorapid |
| Conto A | to | Debenham, Ernest Ridley |
| Dechales 1690 | to | Differenzenmaschine Hamann |
| Differenzenmaschine Thompson | to | Dupuis 1865 |
| Dupuis 1868 | to | EOS Material |
| Ephemeris 1766 | to | Facit NE |
| Facit NEA | to | Fischer 1868 |
| Fischer 1937 | to | Gardiner 1827 |
| Gardner, Clyde | to | Gewindebohrung |
| Gewindebolzen | to | Greve 1910 |
| Greve 1912 | to | Halbautomatisch |
| Halberstadt 1967 | to | Heger 1914 |
| Heinitz, Woldemar | to | How to create a new entry for Rechnerlexikon.de |
| Hrabak 1895 | to | Italien |
| Itemizer Material | to | Kettenaddierer |
| Kewitsch 1895 | to | Köntopp 1963 |
| Kontorsvärlden | to | Lalande/Lacaille 1760 |
| Lalande/Lacaille 1768 | to | LeCoutre 1930 |
| Leder, Ernst Material | to | Locke Adder |
| Locke Adder Werbung | to | Madas 16 e |
| Madas 16 L | to | Mauser KA |
| Mauser Material | to | Mercedes Euklid Mod. 26 W |
| Mercedes Euklid Mod. 29 | to | Monroe 1930 |
| Monroe 209 | to | Multiplexmaschine |
| Multiplicator Perfettus | to | Newcomb 1882 |
| Newsletter 1 | to | Odhner 1204 |
| Odhner 1207 | to | Olding |
| Olivetti | to | Otto Meuter und Sohn |
| Ott Integrimeter | to | Patente aus den USA 1895 |
| Patente aus den USA 1896 | to | Patente aus den USA 1995 |
| Patente aus den USA 1996 | to | Perry 1717 |
| Persönliche Berichte | to | Poleni |
| Polenius | to | Produx Calculator |
| Produx Dekadenschieber | to | Ready Reckoner |
| ReBo Machine a Calculer | to | Reese 1995 |
| Reese 1999 | to | Repetitionsschieber |
| Result | to | Rohrberg 1954 |
| Rohrberg 1955 | to | Sammlertreffen 2011 des italienischen Vereins für Büromaschinen |
| Sammlertreffen Eichenau 1. Oktober 2006 | to | Schlömilch 1872 |
| Schlömilch 1890 | to | Schuelke 1957b |
| Schuelke 1960 | to | Sheepshanks 1844b |
| Sheepshanks 1846 | to | Speidell 1620 |
| Speidell 1621 | to | Stifel, Michael |
| Stift | to | Tastenknopf |
| Tastenlöschung | to | Torchi Rechenmaschine |
| Torpedo | to | Trotter 1851 |
| TRS | to | USA |
| Usan 1967 | to | Victor 37-57-50 |
| Victor 37-7-0 | to | Vlack 1768b |
| Vlack 1775 | to | Webb, Charles Henry |
| Webb, Christopher Frederick | to | Werteverarbeitung, einstufig |
| Werteverarbeitung, zweistufig | to | Wolff 1819 |
| Wolff 2016 | to | Zimmermann 1691 |
| Zimmermann 1896 | to | Zylinderstift |
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