In common usage, a collection is any group of items that has one or more properties in common. For example, paintings from the same artist, or coins from Germany before 1900, see collecting and collectible.
... of age or older. The median age is 36 years. For every 100 females there are 96.3 males. For every 100 females age 18 and over, there are 91.6 males.
The media ...