![English: This is a Casio Casiotone CT-380 Keyboard. Photo taken by myself March 17 2007.; 17 March 2007; Transferred from en.wikipedia to Commons by Common Good using CommonsHelper.; Tompzone at English Wikipedia English: This is a Casio Casiotone CT-380 Keyboard. Photo taken by myself March 17 2007.; 17 March 2007; Transferred from en.wikipedia to Commons by Common Good using CommonsHelper.; Tompzone at English Wikipedia](https://c8.alamy.com/comp/2B8C0PB/english-this-is-a-casio-casiotone-ct-380-keyboard-photo-taken-by-myself-march-17-2007-17-march-2007-transferred-from-enwikipedia-to-commons-by-common-good-using-commonshelper-tompzone-at-english-wikipedia-2B8C0PB.jpg)
English: This is a Casio Casiotone CT-380 Keyboard. Photo taken by myself March 17 2007.; 17 March 2007; Transferred from en.wikipedia to Commons by Common Good using CommonsHelper.; Tompzone at English Wikipedia
![Robbert Dijkgraaf on Twitter: "So true. Max time/$$ for decades. Favorite of many physicists I noticed (and apparently terrorists says Wikipedia). Casio F-91W in today's NYTimes. https://t.co/ecUkAoC4H8" / Twitter Robbert Dijkgraaf on Twitter: "So true. Max time/$$ for decades. Favorite of many physicists I noticed (and apparently terrorists says Wikipedia). Casio F-91W in today's NYTimes. https://t.co/ecUkAoC4H8" / Twitter](https://pbs.twimg.com/media/EC1V_K6XYAEVUIQ.jpg:large)
Robbert Dijkgraaf on Twitter: "So true. Max time/$$ for decades. Favorite of many physicists I noticed (and apparently terrorists says Wikipedia). Casio F-91W in today's NYTimes. https://t.co/ecUkAoC4H8" / Twitter
![Nederlands: Casio rekenmachine. English: Casio calculator. Čeština: Kalkulačka Casio.; 15 June 2007 (original upload date) (Original text: 15-06-07); Transferred from nl.wikipedia to Commons.; Ken123 at Dutch Wikipedia (Original text: Kenny (ken123 Stock Nederlands: Casio rekenmachine. English: Casio calculator. Čeština: Kalkulačka Casio.; 15 June 2007 (original upload date) (Original text: 15-06-07); Transferred from nl.wikipedia to Commons.; Ken123 at Dutch Wikipedia (Original text: Kenny (ken123 Stock](https://c8.alamy.com/comp/2B8C0J7/nederlands-casio-rekenmachine-english-casio-calculator-etina-kalkulaka-casio-15-june-2007-original-upload-date-original-text-15-06-07-transferred-from-nlwikipedia-to-commons-ken123-at-dutch-wikipedia-original-text-kenny-ken123-2B8C0J7.jpg)