An album is a book of photographs, mementos, or a collection of some other kind — like music. As digital forms of photographs and music become more popular, albums are becoming a thing of the past.
A photo album is full of pictures, and a stamp collector's album contains stamps from different countries. Another kind of album is a collection of songs, either on a record or a CD. In Latin, album means "white," and in ancient times it referred to a blank tablet. 16th century German academics kept what they called an album amicorum, or a collection of colleagues' signatures, and from there album came to mean "souvenir book."