Question:
which tables, spro,status ?
Answer:
you can run GETSYSDEF from SE38, it says configuration of the system
Answer:
Or you can do the following:
System > Status
Under the box "SAP System Data" is "Component version"
Click the magnifying glass below this
You can see which software components are installed.
They may not all be configured, but they are installed.
Answer:
SE16 - Table AVERS
Or
transaction SPAM - display current patch level.