This is an original Sinclair QL user guide published by Sinclair Research Ltd in the 1980s. It is a complete and rare vintage item that provides detailed instructions on how to use the Sinclair QL computer. The user guide is specifically designed for those who own Sinclair QL computers and want to learn how to use them effectively. It contains information on various aspects such as programming, technical specifications, and troubleshooting.

The user guide is a valuable addition to any Sinclair QL user's collection, especially for vintage computing enthusiasts. It is a rare and complete item that provides insight into the world of computing in the 1980s. This user guide is a must-have for anyone who wants to experience the nostalgia of vintage computing and learn about the Sinclair QL computer.