Via a Facebook post (login required) by The Centre for Computing History, which has this to say:
We’ve had an incredible donation of American software for the BBC Micro, under “Acorn Computers Corporation”. Apparently these were retrieved from a skip at Acorn in Cambridge when they closed down. We’re not sure they ever went to market.
This range of software was retrieved from a skip at Acorn Computers in Cambridge when the company closed down. These software packages were created for the American education market for the Acorn Computers Corporation, 400 Unicorn Park Drive, Woburn, MA 01801.