Dear members, Can any one help me to know and understand the Studio and Game Development applications?. I appreciate your response. Thanks

Er, no? I don't know what you're talking about... what are "the Studio and Game Development applications"?

The OP also cross-posted this in the Beginners forum. I suggested he click "View Forum FAQ."

many are developed in house.
look at the steam software development kit for example.

that's an in-house application that was released for public use.