Hi,
Every time a usr is logged in, SAp reserves a specific memory area which is user-specific area which can be accessed by user sessions.
SPA/GPA are special memory parameters that an ABAp program can access and are stored in the SAP memory. They are also called SET/GET parameters. These parameters can have names up to 20 characters. In SU01, under parameters tab, you can see the user specific parameter values.
All SPA/GPA parameters are stored in table TPARA which can be maintained.
You can use them in transactions by setting the 'Parameter ID' attribute of a screen field.
Read documentation for SET or GET parameter.
Cheers,
Simha.
Reward all the helpful answers..
