Answer / vijayanand poreddy

SAP Memory
SAP memory is a memory area to which all main sessions
within a SAPgui have access. You can use SAP memory either
to pass data from one program to another within a session,
or to pass data from one session to another. Application
programs that use SAP memory must do so using SPA/GPA
parameters (also known as SET/GET parameters). These
parameters can be set either for a particular user or for a
particular program using the SET PARAMETER statement. Other
ABAP programs can then retrieve the set parameters using
the GET PARAMETER statement. The most frequent use of
SPA/GPA parameters is to fill input fields on screens

ABAP/4 Memory
ABAP memory is a memory area that all ABAP programs within
the same internal session can access using the EXPORT and
IMPORT statements. Data within this area remains intact
during a whole sequence of program calls. To pass data
to a program which you are calling, the data needs to be
placed in ABAP memory before the call is made. The internal
session of the called program then replaces that of the
calling program. The program called can then read from the
ABAP memory. If control is then returned to the program
which made the initial call, the same process operates in
reverse.

SAP memory
The SAP memory, otherwise known as the global memory, is
available to a user during the entire duration of a
terminal session. Its contents are retained across
transaction boundaries as well as external and internal
sessions. The SET PARAMETER and GET PARAMETER statements
allow you to write to, or read from, the SAP memory.

ABAP/4 memory
The contents of the ABAP/4 memory are retained only during
the lifetime of an external session (see also Organization
of Modularization Units). You can retain or pass data
across internal sessions. The EXPORT TO MEMORY and IMPORT
FROM MEMORY statements allow you to write data to, or read
data from, the ABAP memory.

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