Sinclair computer magazine with a heavy emphasis on computer listings to type in. The programs vary from short one page tricks or demo's to full fledged games that span several pages. Unlike a lot of other magazines that featured listings, the Sinclar Programs magazine does not have a check-sum program, so any little mistake typing in the listing can potentially corrupt the program, and you would loose all the hard work. A lesson quickly learned, and avoided by saving your progress to tape often.