*The Museum of HP Calculators*

This Hewlett-Packard advertisement, originally published in Scientific American,
is used by permission. If errors crept in during the scanning process, please
contact Dave Hicks

#
100 reasons to invest $395* in the time and money machine:

To obtain the mean and standard deviation of a series of numbers, for example,
you simply key in the individual numbers, press the SUM+ key after each entry,
then the mean key to display the mean, and the x<>y key to display
the standard deviation. Because the HP-80 has the formula for calculating
the standard deviation built into its logic circuitry, it automatically performs
all the averaging, subtraction, addition, squaring and square root extraction
required by the formula.

##
The HP-80 Business Calculator.

The 9-ounce HP-80 has 40 specific capabilities built into its internal circuitry,
which combine to perform more than 100 different financial calculations involving
a relationship between time and money. All necessary programs, including
a 200-year calendar, are built into the HP-80's solid-state memory.

It used to require up to 20 minutes to solve such time and money problems
as bond calculations, figuring compound interest, loan repayments, depreciation
amortization, investment analysis, sinking fund and statistics. To make matters
worse, they required constant reference to cumbersome tables. You'll notice
this is all in the past tense.

With the advent of the new HP-80, the financial counterpart of the pocket-sized
HP-35, these problems can be solved literally in seconds, and without reference
to any tables.

You just enter the data, push a few keys, and read the answer -- accurate
to within the last penny on a million-dollar transaction.

Since it can perform most financial calculations in about 10 seconds, a user
can save up to 20 minutes on a single problem. The price is $395 (* U.S.
only, plus tax).

If you're in business, you can't afford to be without it. Ask for full
information.

Go back to the HP Advertisements

Go back to the main exhibit hall