Difference in Line manager and Devlopment manager

Hi Folks,

Can somebody please tell me that what is the difference between, Line manager and

Devlopment Manager?

Where do we find them?As i searched in IMG under transaction PPOME that is for

organisation and staffing,but there were positions like pool manager,staffing manager ,resources but couldn't find Line Manager and Devlopment manager.

I am using PTT(system,client 002).

Please answer.

Thanks and Regards

Anshu Jha