Acorn Atom - Released - 1984
ELIZA is an early natural language processing computer program created to demonstrate the superficiality of communication between humans and machines, Eliza simulated conversation by using a 'pattern matching' and substitution methodology that gave users an illusion of understanding on the part of the program, but had no built in framework for contextualizing events. Directives on how to interact were provided by 'scripts', written originally in MAD-Slip, which allowed ELIZA to process user inputs and engage in discourse following the rules and directions of the script. The most famous script, DOCTOR, simulated a Rogerian psychotherapist and used rules, dictated in the script, to respond with non-directional questions to user inputs. As such, ELIZA was one of the first chatterbots and one of the first programs capable of attempting the Turing Test.
BBC Microcomputer System - Released - 1983
An arcade adventure in which you have to find certain objects hidden in the rooms, before your oxygen runs out, and you have to constantly recharge your gun to fight off the monsters who attack you. This game was written by Roger and Andrew Thomas and was originally released by Pro Software, followed later in the same year by the Virgin Games release.