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Glossary 
Patents Index: literature (757 Artikel)
| Abakus in Youtube | to | Business Machines and Equipment Digest |
| Butzbach/Bethmann 1991 | to | Galle 1912 |
| Ganzhorn 1975 | to | IBM 1984 |
| IEEE Annals of the History of Computing | to | Mehmke 1892 |
| Mehmke 1902 | to | Reese/Schneemann 2011 |
| Reese/Vande Velde/Guerin 2017 | to | Stalzer 1989 |
| Stanley 1878 | to | Weiss 2013.4 |
| Weiss 2013.5 | to | Zühlke 1952 |