Data área like "sesión data".

The scenario is as follows:


Within a run-unit, we run a program that calls others (many others).
We would need to have a data area visible by all programs running within that run unit.
Eventually, some program also would update the data in this area, as if it were the "session data".
Any idea how we could implement this requirement?

We are using Visual Cobol 2.2 under Unix.

Any collaboration will be appreciated.