Dr. Dobb's Journal (DDJ) was a monthly journal published in the United States by United Business Media. It covered topics aimed at computer programmers. When launched in 1975, DDJ was the first regular periodical focused on microcomputer software, rather than hardware. In its last years of publication, it was distributed as a PDF monthly, although the principal delivery of Dr. Dobb's content was through the magazine's website. Publication ceased at the end of 2014, with the archived website continuing to be available online.