Chock-A-Block was a BBC children`s television programme, first shown in 1981 and repeated through to 1989 and shown as part of the children`s programme cycle See-Saw (the `new` name for the cycle originally known as Watch with Mother). `Chock-A-Block` was an extremely large yellow computer, modelled to resemble a mainframe of the time; it fi... Found on http://en.wikipedia.org/wiki/Chock-A-Block