Top Tweets for #comptometer
‘... In the recently completed Johnson’s Wax office Building, 60 Comptometers handle practically all figure work of the world’s largest manufacturers of wax polishes. ...’
#businessmachines #Comptometer #calculators #JohnsonsWax #FrankLloydWright #blackandwhitephotography
#Vintage #Comptometer Print by Kaye Menner #Photography Quality #prints lovely #products at:
https://t.co/UAOVe66T34
‘... In the recently completed Johnson’s Wax office Building, 60 Comptometers handle practically all figure work of the world’s largest manufacturers of wax polishes. ...’
#businessmachines #Comptometer #calculators #JohnsonsWax #FrankLloydWright #blackandwhitephotography
#Vintage #Comptometer Print by Kaye Menner #BuyIntoArt #prints #lovely #products at https://t.co/y8p72XSxKa
One repaired and restored ANITA 811 made by Sumlock Comptometer Ltd. This calculator cost £75 back in 1972, that’s £1,052.98 in today’s money. Not cheap!
https://t.co/SOiFoA7t35
#Comptometer #Calculators #VintageComputing
Dora Metcalf #comptometer operator in #WWI munitions factory saw potential in mechanical descendants of abacus. Her system used in 1926 #Irish census. Asked to build bombe machines for codebreakers @bletchleypark 1957 intro'd 1st #Irish electronic computer https://t.co/xgyGF6zMwQ
ON THIS DAY | In 1887, Dorr E. Felt was granted the second of two patents on his comptometer, the first practical and commercially successful key-driven mechanical calculator. Various comptometers were in continuous production from 1887 to the mid 1970's. #OnThisDay #Comptometer
Remember these?!
Comptometer – otherwise known as an adding machine.
You can see this and other curios from the Mill on display at the Archive, now open every Saturday from 10am until 4pm. Book via the website.
#Comptometer #Calculators #Archive #Leeds #Heritage
Dora Metcalf #comptometer operator in #WWI munitions factory saw potential in mechanical descendants of abacus. Her system used in 1926 #Irish census. Asked to build bombe machines for codebreakers @bletchleypark 1957 intro'd 1st #Irish electronic computer https://t.co/xgyGF6Rnoo
Dora Metcalf #comptometer operator in #WWI munitions factory saw potential in mechanical descendants of abacus. Her system used in 1926 #Irish census. Asked to build bombe machines for codebreakers @bletchleypark 1957 intro'd 1st #Irish electronic computer https://t.co/6IXV2F2cKS
A little more #comptometer history that I can't fit in the video but is neat. This image from a 500 page text book on using it shows a simple cover for a row of keys that divides the keyboard between "debits" & "credits" basically making it 2 calculators.
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