> #### How do collections and collection views differ?

> A collection is a logical grouping of resources and views, and a view is a display of user-selected data. The visualization of any collection is one or more views.

> Collections extend the more limited My Fathom views available previously in Fathom Management; views are now incorporated into collections.

> Collections and collection views also differ in the following ways:

> - You can create a collection with an arbitrarily large number of members; however, displaying them all in a single Fathom page might not be practical. Instead, you can create multiple views of a collection; each view can focus on a different aspect of the collection.
> - A collection is hierarchical. You choose the parent for each collection when you create it, thereby allowing you further flexibility in isolating specific performance data.
> - You can create views that include nonresource viewlets, such as resources with alerts or active monitoring plans. Neither of these views corresponds to a single resource and would not, then, equate to a member in a collection, which consists of a group of individual resources.

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