HP·38E/38C - Slide Rule Museum

A Financial Calculator
With Programming Capability!
Your HP-38E is a versatile, handheld financial calculator that uses the
powerful Hewlett-Packard logic system to compute answers to complex
financial, statistical, and mathematical problems in either of two modes:
• Manual Problem Solving. You work step-by-step through the
toughest of problems, choosing from among the dozens of available
operations to calculate the correct answer quickly and easily.
• Programmed Problem Solving. The HP-38E memorizes a
sequence of up to 99 different operations as you press them , and
then repeats that sequence at the touch of one key as often as you
wish to solve a particular type of problem.
Aprogram is nothing more than a sequence of manual keystrokes that is
remembered by the calculator. You can then execute the program as
often as you like. No prior computer programming experience is
necessary for HP-38E calculator programming.
To see the close relationship between the manual solution to a problem
and a programmed solution, let's solve a problem manually, and then use
a program to solve the same problem and others like it.
Manual Problem Solving
Example: The furniture store in your
area is having a huge clearance sale:
25 % off all marked prices (before taxes) .
If the sales tax is 6% , how much does the
sofa and two matching armchairs cost,
now marked $1,780 for the set?
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