October 5, 2024 at 8:35 AM
Absolute beast of a Continental class 900 Comptometer.
An early key driven calculator, that printed results onto paper like a typewriter.
#comptometer #heinznixdorfmuseumsforum #history
An early key driven calculator, that printed results onto paper like a typewriter.
#comptometer #heinznixdorfmuseumsforum #history
February 6, 2025 at 9:16 AM
Absolute beast of a Continental class 900 Comptometer.
An early key driven calculator, that printed results onto paper like a typewriter.
#comptometer #heinznixdorfmuseumsforum #history
An early key driven calculator, that printed results onto paper like a typewriter.
#comptometer #heinznixdorfmuseumsforum #history
She graduated high school right at the beginning of the depression and somehow went on to be certified to use the comptometer, a mechanical calculator, in 1931. I knew this but didn't really appreciate it as a kid. I found her framed diplomas recently and now they're above my desk.
November 18, 2025 at 2:49 AM
She graduated high school right at the beginning of the depression and somehow went on to be certified to use the comptometer, a mechanical calculator, in 1931. I knew this but didn't really appreciate it as a kid. I found her framed diplomas recently and now they're above my desk.
Comptometer is quite the contrived mouthful.
September 21, 2026 at 6:17 PM
Comptometer is quite the contrived mouthful.
I've been fixing up this lovely old mechanical calculator, a wooden Comptometer made in about 1902. Tomorrow I'll put it on my website and post a video.
May 8, 2025 at 8:30 AM
I've been fixing up this lovely old mechanical calculator, a wooden Comptometer made in about 1902. Tomorrow I'll put it on my website and post a video.
September 19, 2026 at 10:24 AM
Spotted in my local charity shop. This is a Duolectric Comptometer, doesn't it look great? Description here: www.computinghistory.org.uk/det/6729/Sum...
January 7, 2026 at 9:51 AM
Spotted in my local charity shop. This is a Duolectric Comptometer, doesn't it look great? Description here: www.computinghistory.org.uk/det/6729/Sum...
Mitch Comptometer
your baseball pitcher name is your grandfather’s first name and the last thing you bought i’ll go first mine’s Dominic Sandals
July 16, 2026 at 2:10 PM
Mitch Comptometer
Daily theme: #brochures
Comptometer Medley 1956.
Comptometer Medley 1956.
February 22, 2024 at 5:07 PM
Daily theme: #brochures
Comptometer Medley 1956.
Comptometer Medley 1956.
And just to put icing on the cake, the COMPTOMETER is mentioned multiple times
April 13, 2024 at 2:25 AM
And just to put icing on the cake, the COMPTOMETER is mentioned multiple times
3/ And the internet rarely fails us 😹 #Comptometer #GenHour
www.vintagecalculators.com/html/operati...
www.vintagecalculators.com/html/operati...
Operating a Comptometer
www.vintagecalculators.com
February 5, 2025 at 8:42 AM
3/ And the internet rarely fails us 😹 #Comptometer #GenHour
www.vintagecalculators.com/html/operati...
www.vintagecalculators.com/html/operati...
In #JULY 1939
🧵👇
The history of '7'
‘Comptometer’
Illustration by John Vickery (1906-1983)
#illustration #illustrationart #illustrationartists #JohnVickery #graphicdesign #graphicdesigners #Comptometer #calculators #businessmachines #numerology
‘Man’s mastery over numbers is ➡️
🧵👇
The history of '7'
‘Comptometer’
Illustration by John Vickery (1906-1983)
#illustration #illustrationart #illustrationartists #JohnVickery #graphicdesign #graphicdesigners #Comptometer #calculators #businessmachines #numerology
‘Man’s mastery over numbers is ➡️
July 11, 2026 at 12:53 PM
In #JULY 1939
🧵👇
The history of '7'
‘Comptometer’
Illustration by John Vickery (1906-1983)
#illustration #illustrationart #illustrationartists #JohnVickery #graphicdesign #graphicdesigners #Comptometer #calculators #businessmachines #numerology
‘Man’s mastery over numbers is ➡️
🧵👇
The history of '7'
‘Comptometer’
Illustration by John Vickery (1906-1983)
#illustration #illustrationart #illustrationartists #JohnVickery #graphicdesign #graphicdesigners #Comptometer #calculators #businessmachines #numerology
‘Man’s mastery over numbers is ➡️
Here's the video of my wood Comptometer, a mechanical calculator from about 1902.
youtu.be/cXQF6svDqKU
youtu.be/cXQF6svDqKU
A wooden Comptometer
YouTube video by Jaap Scherphuis
youtu.be
May 9, 2025 at 10:17 AM
Here's the video of my wood Comptometer, a mechanical calculator from about 1902.
youtu.be/cXQF6svDqKU
youtu.be/cXQF6svDqKU
Dora Metcalf #WWI munitions factory comptometer operator, intro'd mechanised abacus 4 1926 Irish census. #WWII supplied bombe machines 4 Bletchley Park codebreakers. Part of Irish BCG TB vaccination prog. 1957 intro'd 1st #Irish electronic computer d #OTD 17 Oct 1982 en.wikipedia.org/wiki/Dora_Me...
October 17, 2025 at 7:38 AM
Dora Metcalf #WWI munitions factory comptometer operator, intro'd mechanised abacus 4 1926 Irish census. #WWII supplied bombe machines 4 Bletchley Park codebreakers. Part of Irish BCG TB vaccination prog. 1957 intro'd 1st #Irish electronic computer d #OTD 17 Oct 1982 en.wikipedia.org/wiki/Dora_Me...
On an auction site someone is claiming to have a Comptometer for sale, but the picture is some kind of AI-generated rubbish. I don't see the point, but it makes for a fun game: How many errors can you spot?
October 12, 2025 at 10:53 PM
On an auction site someone is claiming to have a Comptometer for sale, but the picture is some kind of AI-generated rubbish. I don't see the point, but it makes for a fun game: How many errors can you spot?
Love that they tried to make it attractive, with that design on the side. Looks (minus the change) a bit like comptometer I had to learn to operate in business college.
September 21, 2026 at 6:55 PM
Love that they tried to make it attractive, with that design on the side. Looks (minus the change) a bit like comptometer I had to learn to operate in business college.
I asked AI for a Comptometer picture of my own and...
(It looks like a very nice kitchen anyway)
(It looks like a very nice kitchen anyway)
October 12, 2025 at 11:26 PM
I asked AI for a Comptometer picture of my own and...
(It looks like a very nice kitchen anyway)
(It looks like a very nice kitchen anyway)
The Felt & Tarrant company made the Comptometer, a type of mechanical calculator that was in production from 1889 till about 1960.
In the 1950s they tried to expand to other products.
Here is an advert for their dictation machine. It was given the manly name, the "Comptometer Commander. (1/3)
In the 1950s they tried to expand to other products.
Here is an advert for their dictation machine. It was given the manly name, the "Comptometer Commander. (1/3)
December 5, 2025 at 11:30 PM
The Felt & Tarrant company made the Comptometer, a type of mechanical calculator that was in production from 1889 till about 1960.
In the 1950s they tried to expand to other products.
Here is an advert for their dictation machine. It was given the manly name, the "Comptometer Commander. (1/3)
In the 1950s they tried to expand to other products.
Here is an advert for their dictation machine. It was given the manly name, the "Comptometer Commander. (1/3)
This is essentially a comptometer. Alas, one of the columns sticks. I'll open it up some day and see if I can fix that. #comptometer #addingmachine
October 17, 2023 at 1:07 AM
This is essentially a comptometer. Alas, one of the columns sticks. I'll open it up some day and see if I can fix that. #comptometer #addingmachine
Dora Metcalf #WWI munitions factory comptometer operator, intro'd mechanised abacus 4 1926 Irish census. #WWII supplied bombe machines 4 Bletchley Park codebreakers. Part of Irish BCG TB vaccination prog. 1957 intro'd 1st #Irish electronic computer d #OTD 17 Oct 1982 en.wikipedia.org/wiki/Dora_Me...
March 11, 2026 at 9:22 PM
Dora Metcalf #WWI munitions factory comptometer operator, intro'd mechanised abacus 4 1926 Irish census. #WWII supplied bombe machines 4 Bletchley Park codebreakers. Part of Irish BCG TB vaccination prog. 1957 intro'd 1st #Irish electronic computer d #OTD 17 Oct 1982 en.wikipedia.org/wiki/Dora_Me...
combining Spinal Tap and Comptometer in one thread ! 😍
December 1, 2025 at 7:15 PM
combining Spinal Tap and Comptometer in one thread ! 😍
Daily theme: #brochures
Comptometer Medley 1956.
Comptometer Medley 1956.
February 8, 2024 at 8:07 AM
Daily theme: #brochures
Comptometer Medley 1956.
Comptometer Medley 1956.
yeah this has re-awakened my desire to get my hands on a Comptometer
November 10, 2024 at 6:06 PM
yeah this has re-awakened my desire to get my hands on a Comptometer
Not a computer but a comptometer used in the 1960’s to calculate income from various offices.
June 30, 2026 at 8:24 PM
Not a computer but a comptometer used in the 1960’s to calculate income from various offices.