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HP HP-25 User Manual
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Battery
Pack
Replacement
If
it
becomes
necessary
to
replace
the
battery
pack,
use
only
another
Hewlett-Packard
battery
pack
like
the
one
shipped
with
your
calculator.
CAUTION
Use
of
any
batteries
other
than
the
Hewlett-Packard
battery
pack
may
result
in
damage
to
your
calculator.
To
replace
the
battery
pack,
use
the
following
procedure:
1.
Set
the
-calculator
ON-
OFF
switch
to
OFF
and
disconnect
the
battery
charger/ac
adapter
from
the
calculator.
2.
Press
down
on
the
thumb-
set
at
the
rear
of
the
calcu-
lator
and
slide
the
battery
pack
in
the
direction
of
the
arrow.
3.
When
the
key
on
the
battery
pack
becomes
visible,
lever
that
end
of
the
pack
up
and
permit
the
battery
pack
to
fall
into
the
palm
of
your
hand.
4.
Insert
the
new
battery
pack
in
the
direction
of
the
arrow.
Slant
the
leading
edge
of
the
pack
into
the
edge
of
the
doorway.
5.
Snap
the
battery
pack
into
place
by
pressing
it
gently.
107
109
Table of Contents
Table of Contents
4
Function Key Index
7
The HP-25 Programmable Scientific Calculator
9
Memory
10
Programming Key Index
10
The HP-25 Means Painless Programming
13
Manual Problem Solving
13
Programmed Problem Solving
14
Section 1: Getting Started
17
Display
17
Keyboard
17
Keying in Numbers
18
Negative Numbers
18
Clearing
19
Functions
19
Chain Calculations
22
A Word Aboutthe HP-25
26
Section 2: Controlling the Display
29
Display Control Keys
29
Automatic Display Switching
34
Keying in Exponents of Ten
35
Calculator Overflow
37
Error Display
37
Section 3: the Automatic Memory Stack
39
The Stack
39
Initial Display
39
Manipulating Stack Contents
39
Clearing the Stack
41
The KBY Oo
42
One-Number Functions and the Stack
44
Two-Number Functions and the Stack
44
Chain Arithmetic
46
Order of Execution
49
Constant Arithmetic
50
Section 4: Function Keys
53
Last X
54
Prefix Clear
54
Number Alteration Keys
55
Reciprocals
56
Square ROOS
56
SQUANING " O
57
Using Pi
57
Percentages
58
Storage Registers
59
Trigonometric Functions
63
Polar/Rectangular Coordinate Conversion
66
Logarithmic and Exponential Functions
67
Statistical Functions
70
Vector Summations
74
Section 5: Programming
77
What Isa Program
77
Why Write Programs
77
Three Modes of Operation
78
Introductory Program
79
Running a Program
82
Gto 00
82
Writing a Second Program
83
Interrupting Program Execution
86
Branching
91
Editing a Program
95
Program Applications
101
Afterword
103
Appendix A: Accessories, Service, and Maintenance
105
Standard Accessories
105
Optional Accessories
105
AC Line Operation
105
Battery Charging
106
Battery Operation
107
Battery Pack Replacement
108
Service
109
Temperature Range
110
Warranty
110
Appendix B: Improper Operations
113
Appendix C: Stack Lift and LAST X
115
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HP HP-25 Specifications
General
Brand
HP
Model
HP-25
Category
Calculator
Language
English
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