Answer / poorvi

For writing to a data area - OUT
For reading from a data area - IN
Before Writing to a data area we LOCK it and then unlock
(UNLCK) after writing to it

Answer / swadesh

When we use data area in (RPG400) we can read this by IN
write through OUT and when write data area we lock this
after write we UNLOCK it.so that we can use this again.

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