HP -25 Owner's Handbook Manual page 40

X ne 1atic Mlemory Stack
Reviewing the Stack
To see how the B key works, first load the stack with num-
bers 1 through 4 by pressing:
5 ENTER+ K] ENTER+ Il ENTER4 )
The numbers that you keyed in are now loaded into the stack,
and its contents looklike this:
4.00
3.00
2.00
1. Display
Each time you press the [ key, the stack contents shift down-
ward one register. So the last number that you have keyed in
will be rotated around to the T-register when you press X3 -
When you press the [ key, the stack contents are rotated . . .
... fromthis . . . . . to this.
T 4.00 T 100
Z 3.00 Z 4.00
Y 200 Y 300
X 1 Display X 200Display
Notice that the contents of the registers are shifted. The regis-
ters themselves maintain their positions. The contents of the
X-register are always displayed, so is now visible.
Press [ again and the stack contents are shifted . . .
... fromthis .. . . . to this.
T 1.00 T 200
Z 400 Z 1.00
Y 3.00 Y 4.00
X 200 Display X 3.00 Display