Steren CAL-150 Instructivo De Uso página 248

Summary
Sub-routines
Sub-routines are used for storing operation formulas that
are repeated as one single block or to store formulas that
are used constantly or operations that bring up other formu-
las when necessary.
The sub-routine command Prog followed by a number (0-9)
indicates the programming area.
Example:
Prog 0...... Skips to the program 0 area
Prog 2...... Skips to the program 2 area
Once the skip has been realized, the execution of the pro-
gram will continue from the beginning of the stored program