HP HP-67

Storage
i) Store. Followed
by address key, stores
displayed number in
primary storage reg-
ister (R, through Rg,
Ra through Rg, )
specified. Also used to
perform storage reg-
ister arithmetic
(page 72).
{8 Recall. Followed
by address key, recalls
number from primary
storage register (R,
through R, Ra through
Re, ) specified into the
displayed X-register
(page 72).
CL REG] Clears con-
tents of all primary
storage registers (R,
through R, R, through
Re, 1) to zero
(page 79).
Recalls num-
ber displayed before
the previous operation
backinto the displayed
X-register (page 67).
Primary ex-
change secondary.
Exchanges contents
of primary storage reg-
isters R, through R,
with contents of pro-
tected secondary
storage registers Rg,
through Rg,
(page 74).
Automatic reg-
ister review. Flashes
contents of storage
registers in order R,
through Ry, R4 through
Re, I, register
address appears in
display preceding con-
tents of storage reg-
ister (page 77).
Display Control
(Fx] Selects fixed
point display
(page 44).
Selects scien-
tific notation display
(page 43).
ENG| Selects engi-
neering notation dis-
play (page 46).
Followed by
number key, selects
number of displayed
digits (page 42).
Mathematics
N!| Computes factorial
of number in displayed
X-register (page 88).
Computes re-
ciprocal of number in
displayed X-register
(page 87).
Computes square
of number in displayed
X-register (page 89).
(=) Computes square
root of number in dis-
played X-register
(page 89).
Places value of pi
(3.141592654) into
displayed X-register
(page 89).
Arithmetic operators
(page 32).
9
Statistics
Accumulates
numbers from X- and
Y-registers into sec-
ondary storage reg-
isters Rs, through Rsg
(page 107).
Z-| Subtracts x and y
values from storage
registers Rs, through
Rs, for correcting or
subtracting P54 ac-
cumulation entries
(page 116).
(&) Computes mean
(average) of x and y
values accumulated
by (page 111).
(s) Computes sample
standard deviations
of x and y values
accumulated by ©
(page 113).
Polar/Rectangular
Conversion
Converts x, y
rectangular coordi-
nates placed in X- and
Y-registers to polar
magnituder and angle
6 (page 99).
D Converts polar
magnituder and angle
6in X- and Y-registers
to rectangular x and y
coordinates (page
100).
Flags
SF| Set flag. Followed
by flag designator (0,
1, 2, or 3), sets flag
true (page 255).
CF| Clear flag. Follow-
ed by flag designator
0, 1, 2, or 3), clears
flag (page 255).