Posing as an Abyss computer, the Archie is in the classroom and the children use it to hack into Eldrich's files.
The graphical abilities of the machine are right, but it also seems to have wireless networking and human/computer "symbiosis".
Year of feature (shown above)
The Acorn Archimedes also appears in a number of episodes of 'Capital City'
The Acorn Archimedes was used in the dealing room scenes in ITV's 'Capital City':