Object type

Collection resources

Deployment

Application Catalog

Software Center

Application

Users or groups

Available deployment,
does not require approval

Yes

After installation is initiated successfully from the Application Catalog

Users or groups

Available deployment,
requires approval

Yes

After the application is approved

Users or groups

Required deployment

No

Yes

Computers

Available or required deployment

No

Yes

Package and program

Users or groups

Available deployment

Yes

After installation is initiated successfully from the Application Catalog

Users or groups

Required deployment

No

Yes

Computers

Available or required deployment

No

Yes

http://blogs.technet.com/b/configmgrteam/archive/2012/03/31/introducing-the-application-catalog-and-software-center-in-system-center-2012-configuration-manager.aspx