“The high-frequency tones (or mosquito ringtones) are those above 17kHz. Most people over the age of 30 will not be able to hear them.”
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Claim Alzheimer’s, if only you could remember his first name…
Just in case it was Alois Alzheimer
1864–1915 the German neurologist
I spent what was a significant sum at the time on a Pickett. I dropped it once and the thing became very hard to slide. It went missing one day after I parked it on top of a coat rack. My old bamboo (which I got as a gift from my grandfather) still works to this day.
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In college we needed to do some fairly precise calculations for an atomic physics lab. It involved 6 decimal places and multiplications. We were allowed to use an electric ‘Comptometer’ that was housed in the department head’s office. A great beast of a mechanical contraption it multiplied by successive addition. It was slow and noisy. Our use of it did not endear us to the secretary that worked there. However it was worlds faster than paper and pencil. No electronic calculators were available to us. Only the chemistry department had one and we were not allowed to touch it. Slide rules were great for 3 digit accuracy, but beyond that it was not good.
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I’ve seen financial graphs with log scales. If one is not careful it can give misleading impressions of changes over time.
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We had those mechanical calculators for statistics. They were great for sums of squares. A friend of mine actually pulled one to pieces and repaired it.
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You gentlemen are all making me feel quite old, like maybe I was trimming wicks in the rooms where these fancy adding machines and slide rules were used. I had classes in the Moore School of Engineering at the Univ of Pennsylvania; ENIAC lived in the basement.
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We had UTECOM in the basement.
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Think we had RATS in our university basement
I had to look up what a UTECOM was, before my time.
This is getting like the old joke…
You had a basement !
We had a cardboard box !
You had a cardboard box !
We had newspapers …
Ok its not funny some don’t have that even now in modern societies
The ENIAC (Electronic Numerical Integrator and Computer), built in the years 1943 to 1946, is widely regarded as the first general-purpose electronic digital computer. The ENIAC Museum is on the ground floor of the Moore School Building, 200 South 33rd Street, of the University of Pennsylvania. This museum is located just 20m away from the very original location of the Eniac installation, in the student lounge area. The ENIAC Museum contains four of the original 40 panels of the machine, as well as many other artifacts.
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UTECOM is later than that (1955)
The first Australian computer was CSIRAC… built in 1949 by my Organization CSIRO. It is still intact today… in a Melbourne museum.
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My kids and grandkids would approve placing me in a museum.
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I went to Iowa State where the first digital computer was built: the Atanasoff-Berry computer. There is a nice book about it.
That was well before I started there though. I was using a PDP-11 for Pascal on cards.
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The long forgotten history of a life before microsoft and apple
Everything we have today is built on top of the past.
The spirit of the past lives on today, it is built into everything.
Everything we do today imprints on the future.
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I still have mine! (Haven’t used it since 1974.)
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Hi Dave,
Get it out and freshen up your skills.
How long since you used a set of log tables?
Regards
Neville
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Same time frame Neville. I’ll have to find my TI-35 too I guess. (NOT! I’m retired now.)
Much Regards
Dave
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Me too. Retirement does not mean stopping.
It is when you rediscover all the interesting things that you never had time for while working.
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Then I guess I will need my TI-35. It does my logs for me!
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