1) The word "book" contains two vowels: O and O.

2) Johnny Depp is an American actor and producer known for his unique and versatile performances in films such as the "Pirates of the Caribbean" series, "Edward Scissorhands," and "Sweeney Todd: The Demon Barber of Fleet Street." He has received multiple accolades for his work.

3) The abolition of slavery in the United States was officially proclaimed with the ratification of the 13th Amendment to the Constitution in 1865.

4) The first commercially available digital camera, the Dycam Model 1, was introduced in 1990 and had a resolution of 376 x 240 pixels.