HP -11C Owner's Handbook Manual page 6

The HP-11C Keyboard and
Continuous Memory
PROGRAM MEMORY
STORAGE REGISTERS
Permanent Shared Permanent Shared
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Your HP-11C:
A Problem Solver
Your HP-11C Programmable Scientific Calculator is a powerful
problem solver you can carry with you almost anywhere to handle
problems ranging from the simple to the complex, and to remember
important data. The HP-11C is so easy to program and use that it
requires no prior programming experience or knowledge of
programming languages.
The HP-11C helps you to conserve power by automatically shutting
itself off if it is left on and inactive for more than 8 to 17 minutes.
But don't worry about losing data—any information you have
keyed into your HP-11C is saved by Continuous Memory.
We're different! Your Hewlett-Packard calculator uses a unique
operating logic, represented by the key, that differs from the
logic in most other calculators. The power in HP calculator logic
becomes obvious through use. Later we will cover the details of
and your HP-11C's logic, but right now let's get acquainted
with [ENTER] by seeing how easy it is to perform calculations with
your HP-11C,
Answers appear immediately after you press a numerical function
key. For example, let's look at the arithmetic functions. The (4) key
adds the last entry to whatever is already in the machine, and the
=] key subtracts the last entry; the [x] key multiplies what's in the
machine by the last entry, and the [=] key divides by the last entry.
First we have to get the numbers into the machine. To do this, key
in the first number, press [ENTER] to separate the first number from
the second, then key in the second number and press (+], [=], [x], or
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