HP HP-21 - Page 65

Keyboard index, 5
Keying in numbers, 8
L
Left-to-right order, 34
Logarithm, common, 49
Logarithmic and exponential functions, 48
Logarithm, natural, 48
Low power display, 56
M
Manual storage, 41
N
Natural antilogarithm, 48
Natural logarithm, 48
Negative numbers, 8
Negative powers of ten, 22
Numbers, keying in, 8
0
Operations, improper, 38, 59
Overextended calculation, 24
Overflow, automatic, 20, 21
P
Pi, 40
Polar/rectangular coordinate conversion, 46
Power on, 7-8
Powers of ten, 21
R
Radians mode, 44
Raising numbers to powers, 11, 22, 50
Recalling data, 41
Reciprocals, 39
Rectangular/polar coordinate conversion, 46
Registers, 4, 25, 41
manual storage, 41
Repairs, 56, 57, 58
Repair warranty, 57
Reserve power pack, 56
Reviewing the stack, 26
Roll down, 26, 37
Rounding, 18,19, 20
RPN (Reverse Polish Notation), 15