ABAP Memory- The contents of the ABAP/4 memory are retained

only during the lifetime of an external session. You can

retain or pass data across internal sessions. The EXPORT to

memory and IMPPORT from MEMORY statement allow you to write

data to or read data from the ABAP memory.

EX: EXPORT it_tab TO MEMORY ID 'ZADI1'.

IMPORT it_TAB FROM MEMORY ID 'ZADI1'.

SAP MEMORY - Otherwise known as global memory is available

to a user during the entire duartion of a terminal session.

It's contents are retained across transaction boundaries as

well as external and internal sessions. SET PARAMETER & GET

PARAMETER statements allows you to WRITE TO/ READ from the

SAP memory.