HP 25 User Manual

30
11
17
The Automatic Memory Stack 43
T
Z
Y
X
T
Z
Y
X
T
Z
Y
x
0.00
0.00
16.00
30.
0.
00
0 .00
0. 00
46.00
0.00
0.
00
46.00
11.
T 0. 00
z
y
X
T
Z
Y
X
0.00
0.
00
57.00
0.00
0.00
57.00
17.00
T 0.00
z
y
X
0.00
0.00
74.00
30 writes ove r the 16 in X.
16 and 30 are ad ded together.
The answer , 46, is displ ayed.
11 is keyed into the displ aye d
X-register. The 46 in the st ack
is aut om atically r aise d.
46 and
11 are a dd ed togeth er.
The an swe r, 57, is displayed .
17 is keyed into the X-register.
57 is a ut omatica ll y entered
into Y.
57 and 17 are add
ed together
for the final an swer.
After any calculation or number manipu lation, the sta ck auto-
m atica lly lifts when a new numb er is keyed in. Because ope ra-
tions
are p erfo rmed when the operations a re pressed, the length
of such chain problems is unlimited unless a numb er in one of
the stack regis ter s excee ds the range of the ca lc ulator (up to
9.999999999
x 10
99
).
In ad dition to the a utom atic stack lift after a ca lculation , the
s tack a utom atically drops during ca l cu l at ions involving both

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