DBA studio and Enterprise Manager

Question:

DBA studio, <-> Enterprise Manager

Oracle DBA studio and Enterprise Manager can both be used to manage databases. What is the difference between them?

My answer is:

Oracle Enterprise manger (OEM) include several parts: Enterprise Manager, addtional management tools and collect serverices.

Dbastudio belongs to enterprise manager, is one part of DBA management tools.

When oracle was version 8, there are six tools in DBA management tools: Data Manager, backup manager, instance manager, schema manager, security manager and Storage Manager. they are all independ and they also can be used with OEM console.

Start from Oracle8i, Oracle seperate OEM from database server.

And Oracle8i combined part of those six tools 'feature together, named it dbastuido.

You still can find those six tools if you choose custom install OEM.