Storage Register Operations - HP -10C Owner's Handbook Manual

28 Section 2: Memory Stack, LAST X, and Data Storage
When you press * the first time, you calculate 1.15 × 1000. The result
(1,150.00) is displayed in the X-register, the stack drops, and a new copy of the
constant is generated in the T-register. That is, given a constant c and a variable
x, each time you press *
1. A new calculation involving the X- and
Y-registers takes place.
2. The result of the calculation is placed in
the display (X-register) and the contents
of the rest of the stack drop.
3. A new copy of the number last in T (in
this case, our constant) is generated in T.
Since a new copy of the growth factor is duplicated in the T-register each time
the stack drops, you never have to re-enter it.

Storage Register Operations

Storing and recalling numbers are operations involving the display (X-register)
and the 10 data storage registers of the HP-10C. Data storage registers are
entirely separate from the stack and LAST X registers.