William Martens (born August 1964) is a computer engineer and magazine editor known for writing articles for the magazine Call-A.P.P.L.E., including the long running "Bytes from the A.P.P.L.E.", a product introduction article. His invention of The Library 1.1 allows A.P.P.L.E. to produce the software and document libraries in a matter of seconds covering the entire range of Apple computers.