What is the difference in lso_psv1 and psv1

Hi All,

What is the difference between psv1 and lso_psv1 transaction code in LSO ?

And pv02 and lso_pv02 ?

And what's the difference between training and event management and TEM in LSO ?

Please share your experiences. Thanks for your time in advance.

Regards,

Anil Kumar.