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summap20 [2017/05/14 14:59] clodoveu |
summap20 [2017/05/14 18:27] (current) clodoveu |
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| **More on this machine** | **More on this machine** | ||
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| + | [[http://www.aconit.org/histoire/calcul_mecanique/documents/Olivetti_Summa_Quanta_20.pdf | An explanation of the design of the Summa Quanta 20, an electrical machine similar to the Summa Prima 20, a successor to the Summa 15. The calculating principle is the same]] | ||
| [[http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/Olivetti Summa Prima 20 Quick Reference Guide (Spanish).pdf|Olivetti Summa Prima 20 quick reference guide, in Spanish]] | [[http://www.dcc.ufmg.br/~clodoveu/files/Images/SummaPrima20/Olivetti Summa Prima 20 Quick Reference Guide (Spanish).pdf|Olivetti Summa Prima 20 quick reference guide, in Spanish]] | ||
