Home » Science & Technology » The Olivetti Summa 15 adding machine

The Olivetti Summa 15 adding machine

Written By Jaap Scherphuis on Saturday, Oct 22, 2022 | 03:23 AM

 
The Olivetti Summa 15 adding machine was made in Italy in the 1950s. Its most unusual feature is the multi-function button that looks like a joystick. For more information on this and other machines in my collection, please visit my website: https://www.jaapsch.net/mechcalc/ 0:00 Introduction, history 1:06 Manual lever 1:36 Paper feed 1:53 Multi-function button 2:30 Entering numbers, clearing input 2:57 Addition 3:15 Totals and subtotals 4:05 Subtraction 4:25 Non-Add function 4:49 Button release 5:08 Repeat, multiplication 6:28 Ink ribbon 7:05 Negative totals 7:42 Serial number 8:11 Outro

Disclaimer:
All images, musics and videos copyright are belong to their respective owners. We just put embed contents from Youtube.com and do not host any content in our server. These content(s) may be protected by copyright law or other laws regarding intellectual property of the United States or other countries. Downloading file(s) on this site is just for review purpose. If you love the song, please support the artists by buying the original CD/Cassette or buying the song from iTunes.