OPERATION
The
Rockwell 61 RAdvanced Slide
Rule has
20
keys, including a
unique
"second
function"
key
that
allows
each
key
to
have
two
separate
uses.
The
first (primary)
use
is identified
on
the
face
of
the
key;
the
second
(secondary) use
is
identified
above
the
key. In
this
manual,
the
first
use
is
represented
(except
for
digits)
by enclosing
the
identification
in
a
box,
0;
the
second use,
by
enclosing
the
identification in parentheses, (
).
The
following
explanation
will
help
you understand the operation and
uses
of
each key.
DIGIT
ENTRY
KEYS
[Q]
THROUGH
ffil:
Depressing
any
digit
key
enters
that
digit
and
causes
it
to
appear
in
the
displaY.,.
To
enter
the
number
24,
depress Wfirst,
then
@1
DECIMAL
POINT
ENTRY
KEY
0:
Depressing
the
0
key
places
the decimal
point
in
your
entries.
ARITHMETIC
FUNCTION
KEYS
[±]
ADD,
EJ
SUBTRACT,
Ii]
MUL-
10
TIPLY, GDIVIDE: Depressing
any
of
these four
keys
selects the
next
operation
to
be
performed
by
the
calculator and
causes
the previously
selected operation
to
be executed.
During calculations, intermediate
results are
automatically
displayed
after
these keys are depressed.
ANSWER
KEY
0:
Depressing
the
0
key
causes
your
answer
to
appear in the dis-
play,
then
terminates
the
calculation.
The answer can be retained
as
the
first number
for
your
next
calcu-
lation (see page 16).
CLEAR
KEY
~:
Depressing
the
~
key
clears
the display
of
erroneous entries,
cancels overflow conditions,
or
clears
the
calculator
of
stored
num-
bers
and
functions. (See Clear Opera-
tions, page
23,
for
detailed instruc-
tions
on
use
of
the
~
key.)
CHANGE
SIGN
KEY
1+/-1:
Depressing
the
1+/-1
key
changes
the
sign
of
adisplayed
number.
11
~
..
