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There's a New Ubuntu Software Center
There's a New Ubuntu Software Center
The Ubuntu Software Center, available under the Applications menu and pictured in Figure 3, replaces the Add/Remove Applications tool of previous Ubuntu versions.
It's now a bit more user-friendly. Applications available from the Ubuntu repositories are organized in an app store in which users can browse through categorized lists or perform searches.
If you prefer the Synaptic Package Manager, don't worry; it's still available by clicking System > Administration.