HP 25 User Manual

I
Function Key Index
Manual RUN Mode. PRGM-RUN switch PAGM..aJ RUN set to RUN .
FUnction keys pressed
from the keyboard execute individual functions as
they are pressed.
Input numbers and answers are displayed.
[@ Fi xed display. ~ Percent. Calculates
Followed by a
number x% of y (page 54) .
key, selects fixed
point notation display
(page26).
~ Scientific display.
Followed by a
number
key, selects scientific
notation display
(page 27) .
@@ Engineering
display. Followed by a
number key, selects
engineering notation
display (page 28).
~ Prefix key. Press
before
function key
to
select function
printed in gold on the
keyboard above
function key
(page13) .
• Prefix key. Press
before
function key
to select function
printed in blue on
slanted face
of
function key
(page13).
00 Mean. Calculates
mean (average)
of the
numbers totaled by
Ell in storage register
R, (page 67).
mJ x exchange y.
Exchanges contents
of X- and V-registers
(page 37) .
o Standard deviation.
Calculates standard
deviation usi ng
numbers totaled by
Ell in storage
registers R3
through
R, (page 68) .
mJ Roll down . Rolls
down contents of
stack for viewing in
displayed X-register
(page 36).
00 Reciprocal.
Calculates
reciprocal
of the number in the
display (page 52) .
EStore . Followed
by
number key, stores
displayed
number in
storage register (0-7)
specified. Followed
by
arithmetic operator
key, performs storage
register
arithmetic
(page 55) .
_Recall. Followed
by
number key, recalls
value
from storage
register (0-7) specified
into the displayed
X-register (Page
55) .
5
[] Summation
minus. Subtracts
values from storage
registers
R3 through
R, for correcting
Ell summation
entries (page 69) .
Ell Summation .
Sums
numbers in X-
and V-registers into
storage registers
R3
through R,
(page 66).
I
PREFIX I Clear prefix.
After
~ , • ,E,
_ or mm ' cancels
that key (page 50).
I:mD Copies
number in displayed
X-register
into
V-register (page 16).
I3mIChange sign.
Changes sign
of
displayed number or
exponent of 10
(page 14) .
~ Degrees. Sets
decimal degree mode
for trigonometric
functions (page 59).
I
REG IClear registers.
Replaces
contents of
storage registers Ro
through R, with zeros
(page 56).

HP 25 Specifications

General

Power Source	Rechargeable battery pack
Programming Steps	49
Release Year	1975
Functions	Trigonometric, logarithmic, statistical
Type	Scientific
Dimensions	148 x 80 x 14 mm