The A3020 is in fact the file server to the little Econet which was assembled on the landing outside the main "Acorn World" room. After the delusions of grandeur exhibited at Byte-Back with Econet building going on all over the shop, they kept the Econet nuts sectioned off at Acorn World!

The A3020 is running the Acorn Level 4 File Server, and the Atom has just logged on, as can be seen by the file server monitor output.