This Programmable RPN calculator has 6 unique keypads
(see below) and 15 discrete calculators for the more
complex functions. It has a complete help system with
individual tips for all but the most ordinary
functions and a Tip of the Day feature for new users.
Select fixed, scientific or engineering notation and
degrees, radians, or grads. Save and print the
contents of the running tape display. There are 24
storage registers that can be identified by name, and
it is now programmable, using the easy to learn RECPL
(RPN Engineering Calculator Programming Language).
Functions available from any keypad: REG, for
manipulating the storage registers (2 of these are
used for register arithmetic); Lastx, recalls the last
number used; Drop, deletes the number in x-reg and
Drops the number in y-reg into x-reg; exchange the
values in the x-reg and y-reg; x²; square root of x;
1/x; and 8 constants involving pi. Some keypads also
have a function to convert between polar and
rectangular coordinates. Briefly, unique to the 6
keypads are: Standard; several of the functions found
on a normal scientific calculator (log, ln, N!, etc.),
and some unique to itself: a simple math teaching aid
for kids, Wind Chill calculator, and more.
Engineering; handles problems like Resonant Frequency,
Ohms Law, Parallel Complex Impedances, Polynomial
Equations, Impedance of a Ladder Network, and lots
more. Binary; is used to manipulate unsigned Binary
integers of various lengths (word size) from 4 to 64
bits, about 22 functions are available. Magnetics; for
the design of transformers and inductors with many
built in functions unique to magnetic component
design. Trig; solves Arc Length, Right Triangle, and
any Defined Plane Triangle problems, also computes the
trig functions, as well as some hyperbolic functions.
Converts Radians to Degrees, and Hours, Minutes,
Seconds to Decimal Hours and vice versa. Convert;
thousands of conversions, more than 40 physical
constants and many specific gravities.

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