Hewlett-Packard 20S Owner's Manual
Scientific
Calculator
Owner’s
Manual
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HP-20S
Scientific
Calculator
Owner’s
Manual
fi
HEWLETT
PACKARD
Edition5August
Part
Number
@
1992
00020-90001
The
contents
of
this
manual
are
printed
on
recycled
paper.
Notice
For
warranty
and
120.
This
manual
are
subjecttochange
no
warrantyofany
limited
particular
errorsorfor
furnishing,
contained
o
Hewlett-Packard
adaptation,ortranslationofthis
written
the
copyright
The
programs
are
reserved.
without
prohibited.
and
to,
the
purpose.
regulatory
and
any
implied
examples
without
kind
Hewlett-Packard
information
notice.
with
regardtothis
warrantiesofmerchantability
incidentalorconsequential
performance,oruseofthis
herein.
Co.
1988.
All
permissionofHewlett-Packard
laws.
that
Reproduction,
prior
written
control
your
adaptation,ortranslationofthose
permissionofHewlett-Packard
for
this
calculator,
contained
herein
are
Hewlett-Packard
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Co.
shall
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manualorthe
rights
reserved.
Reproduction,
manualisprohibited
Company,
calculator
are
exceptasallowed
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see
provided
Company
including,
and
fitness
for
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without
prior
and
Co.isalso
pages
“as
is”
makes
but
not
for
a
any
with
the
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under
all
rights
programs
117
and
Corvallis
1000
Corvallis,
Division
N.E.
Printing
Edition
Edition
Edition
Edition
Edition
1
2
3
4
5§
Circle
OR
97330,
History
Blvd.
U.S.A.
April
September
June
August
August
1988
1988
1989
1991
1992
Welcome
Your
HP-20Sisanother
to
detailinengineering
Hewlett-Packard
stands
behind
tisetosupport
Hewlett-Packard
Our
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This
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Welcome
to
the
HP-20S
3
Features
Large
12-character
Ten
data
One-
and
Probability
Unit
and
Polar
/rectangular
Hyperbolic
Accurate
Keystroke
Six
built-in
=
Root
finder.
n
Numerical
u
Complex
®3X3matrix
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Quadratic
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display.
registers
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two-variable
functions.
base
conversions.
conversions.
functions.
math,
12-digits
programming.
programs:
integration.
number
solutions.
equation.
fitting.
99
program
statistics
witha10%%%
operations.
with
lines.
linear
regression.
exponent
range.
4
Welcome
to
the
HP-20S
Contents
1
12
12
12
12
13
14
14
14
15
15
16
17
17
18
19
20
20
21
9
Getting
9 Power
9
Adjusting
9
Simple
Understanding
The
Clearing
Clearing
Annunciators
The
The
The
The
Introducing
Display
Specifying
Places
Displaying
(ALL)
Scientific
Interchanging
Full
Range
Messages
Started
On
and
Off
the
Display
Arithmetic
the
Cursor
the
Calculator
Memory
Shift
Keys
INPUT
SWAP
Alpha
Precision
of
Key
Key
Keys
the
Math
FormatofNumbers
the
Number
(FIX)
the
Full
and
Engineering
the
of a
Numbers
Contrast
Calculations
Display
Period
Number
and
Keyboard
Functions
of
Displayed
PrecisionofNumbers
Notation
and
Comma
(SHOW)
Decimal
2
22
22
22
24
25
26
27
Arithmetic
Chain
Reusing
Exchanging
Using
Calculations
Operator
Using
Parentheses
the
Storage
and
Storage
Priority
Previous
Two
Numbers
Registers
and
Result
Registers
Pending
(LAST)
(SWAP)
Operations
Contents
5
Numeric
30
31
32
32
33
34
34
34
35
36
38
39
40
41
42
4
44
44
47
47
49
General
Reciprocal
Percent
Percent
Percent
Pi
()
Trigonometric
Changing
Trigonometric
Angle
Coordinate
Probability
Hyperbolic
PartsofNumbers
Unit
Base
Switching
RepresentationofNumbers
RangeofHexadecimal,
Arithmetic
Functions
and
Logarithmic
Functions
Change
Modes
the
and
Hour
Conversions
Functions
Functions
Conversions
Conversions
Bases
Operations
Functions
and
Functions
Trigonometric
Functions
Conversions
and
Base
Octal,
Mode
Arithmetic
and
Binary
Numbers
S
51
51
53
53
54
Statistical
Entering
Clearing
Summary
Mean,
Calculations
Statistical
Statistical
of
Statistical
Standard
Data
Data
Calculations
Deviation,
and
Summation
Statistics
55
57
59
60
6
Contents
Calculating
Linear
Weighted
Regression
Mean
Statistical
the
Population
Formulas
and
Standard
Estimation
Deviation
61
64
66
67
68
69
69
70
70
71
71
72
73
75
76
80
80
81
Programming
Creating
Programs
Program
Entering
Positioning
Running
Programs
Starting
Starting
Stopping
Clearing
Editing
Stepping
Sample
Sample
Programs
Programs
Programs
Through
Program:
Program:
Subroutines
Branching
Branching
Conditional
Boundaries
(LBL
and
Programs
the
Program
Programs
Programs
With
With
Pointer
XEQ
GTO
Programs
Pythagorean
and
Conditionals
Random
Number
(GTO)
Instructions—Decisions
RTN)
and
Theorem
Generator
R/S
and
Control
85
87
87
Keystrokes
Available
for
Program
Nonprogrammable
Other
Memory
Functions
Conditionals
88
89
91
94
97
102
105
Built-in
Root
Finder
Numerical
Complex
3X3
Quadratic
Curve
Matrix
Fitting
Program
(root)
Integration
Operations
Operations(3bY
Equation
(Fit)
Library
(int)
(CPL)
(qQUAd)
3)
Contents
7
Appendix
109
109
109
111
111
111
113
114
114
114
116
117
117
117
118
118
118
119
119
120
120
120
Assistance,
Obtaining
Answers
Power
and
Low
Installing
Resetting
Erasing
Environmental
Batteries,
HelpinOperating
to
Common
Batteries
Power
Annunciator
Batteries
the
Calculator
Continuous
Limits
Determiningifthe
Confirming
Limited
Calculator
One-Year
WhatisCovered
WhatisNot
Consumer
If
the
Calculator
Obtaining
Service
Shipping
Warranty
Service
Regulatory
Covered
Transactionsinthe
Service
Charge
Instructions
on
Service
Agreements
Information
Questions
Memory
Calculator
Operation—the
Warranty
Requires
Memory,
the
]
Service
and
Calculator
Requires
United
Service
Service
Self-Test
Kingdom
122
124
Contents
Messages
Index
Getting
Power
Started
On
and
To
turnonyour
“ON”
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