Steren CAL-150 Instructivo De Uso página 234

will also be able to determine the status of the programs.
Basically, one function requires only one step. However,
there are some commands that require two steps.
One function / one step: sin, cos, tan, log, (,): A, B, 1, 2, 3,
etc.
One function / two steps: Lbl 1, Goto 2, Prog 8, etc.
Every step can be verifi ed by moving the cursor
Programming Areas and Calculation Modes
This calculator contains a total of 10 programming areas
(from P0 to P9) for the storage of programs.
A principal program and a number of secondary programs
can b stored as well. The total number of steps to be stored
is 400.
Only the number of programs that do not contain data will
be shown.