QUANTA Computers, Systems, Sinclair, QL - QUANTA. Official website of the QL Users and Tinkerers Association (QUANTA), the independent QL user group. https://www.quanta.org.uk/
firshman.co.uk Computers, Systems, Sinclair, QL - TF Services. Tony Firshman's products and support services for the Sinclair QL. http://firshman.co.uk/
q40.de: The Home of Q40 and Q60 users Computers, Systems, Sinclair, QL - Q40: The New Sinclair QL Successor. Details of a new Sinclair QL-derived machine with a greatly improved specification. http://www.q40.de/