09-26-2014, 09:11 AM

Browsing through the net I came across a series of interesting articles about HP (and not only) calculators. I am sure many of you know all of it already but perhaps there are some who could benefit - enjoy!

"HP CALCULATOR HISTORY - THE HP-35

Introduced on July 1 1972, this was the first handheld electronic

calculator sold by HP, and the first ever to perform logarithmic and

trigonometric functions with one keystroke. As opposed to later HP

calculators, it has an x^y function, not y^x, and the trigonometric

functions work in degrees only. The story goes that it was made after

William Hewlett was shown a new scientific desktop calculator by his

engineers, and asked for a version to fit in his shirt-pocket. At

first, HP thought they would only make a few HP-35s for their own

engineers, as no-one else would be interested. Then they decided to

try selling it - and sold hundreds of thousands. This means that the

HP-35 is not particularly rare, but collectors will pay a good price

for one because the HP-35 was the first HP handheld. We celebrated its

twentieth anniversary last year, and articles about it were published

in the proceedings of our 1992 conference and in DATAFILE V12N2. The

latter article includes details of the three different types of HP-35

made."

Read more: http://www.hpcc.org/calculators/wmjarts.html

http://articles.latimes.com/2013/aug/28/...s-20130826

http://www.scienceclarified.com/Bi-Ca/Calculator.html

"HP CALCULATOR HISTORY - THE HP-35

Introduced on July 1 1972, this was the first handheld electronic

calculator sold by HP, and the first ever to perform logarithmic and

trigonometric functions with one keystroke. As opposed to later HP

calculators, it has an x^y function, not y^x, and the trigonometric

functions work in degrees only. The story goes that it was made after

William Hewlett was shown a new scientific desktop calculator by his

engineers, and asked for a version to fit in his shirt-pocket. At

first, HP thought they would only make a few HP-35s for their own

engineers, as no-one else would be interested. Then they decided to

try selling it - and sold hundreds of thousands. This means that the

HP-35 is not particularly rare, but collectors will pay a good price

for one because the HP-35 was the first HP handheld. We celebrated its

twentieth anniversary last year, and articles about it were published

in the proceedings of our 1992 conference and in DATAFILE V12N2. The

latter article includes details of the three different types of HP-35

made."

Read more: http://www.hpcc.org/calculators/wmjarts.html

http://articles.latimes.com/2013/aug/28/...s-20130826

http://www.scienceclarified.com/Bi-Ca/Calculator.html