Internal tables store data during payroll. The system imports data to these tables and used them to calculate new data. This data is then also saved in internal tables.

At the start of the payroll run, the system reads the values from the results tables to the old results table (ORT). Data from the previous period is, therefore, available in the current payroll period.

The most important internal tables are:

• Input table (IT)
  Table IT contains data that can be edited. The table exists only during processing.
• Output table (OT)
  Table OT contains the results of an activity. These results are written to the input table for further processing. The table exists only during processing.
• Results table (RT)
  Table RT contains the results of the period for which payroll has been run. The system saves this data in the PCL2 file in cluster RX.