Cigarette card albums
Once it became popular to collect sets of cards, albums were produced to contain them. Initially these were designed so that the cards could be stuck in. Later cigarette manufacturers issued albums which held the cards by the corners or edges.
Sometimes cards may be damaged by the use of the manufacturers' albums, so these are therefore not the best way to store cards; more modern albums are available.
Interestingly enough, many of the albums produced by cigarette manufacturers did not bear the name of the set and so could be used for any 50 cards. Trade card albums, however, still usually carry the set name, probably because the number and size of cards in each set often varies. Usually they have places for the cards to be stuck so that you can see the picture and the text on the rear of the card is reprinted in the album.