Autographs
An autograph is a document written entirely in the handwriting of its author, as opposed to a typeset document or one transcribed by an amanuensis or a copyist; the meaning overlaps with that of the word holograph.
Autograph also refers to a person's signature. This term is used in particular for the practice of collecting autographs of celebrities. The hobby of collecting autographs is known as philography.
Some of the most popular categories of autograph subjects are Presidents, military figures, sports, popular culture, artists, social and religious leaders, scientists, astronauts and authors.
Some collectors may specialize in specific fields (such as Nobel Prize winners) or general topics (military leaders participating in World War I) or specific documents (i.e., signers of the Charter of the United Nations; signers of the U.S. Constitution; signers of the Israeli Declaration of Independence; signers of the Charter of the European Common Union; signers of the WWII German or Japanese Surrender documents).
Sports memorabilia signed by a whole team can often be sold for hundreds or thousands of dollars.