Sinclair User, often abbreviated SU, was a magazine dedicated to the Sinclair Research range of home computers, most specifically the ZX Spectrum (while also occasionally covering arcade games). Initially published by ECC Publications, and later EMAP, it was published in the UK between 1982 and 1993, and was the longest running Sinclair-based magazine. Like many similar magazines, it contained news, game reviews, previews, tips, help guides, regular columns, readers' letters and cover-mounted game demos.