This recording is the eighteenth episode of the United Nations Radio series Easy as ABC, an educational series for children written by Gerald Kean and produced by UNESCO and United Nations Radio. Although broadcast internationally, this is a recording of the American broadcast. The series is hosted by Frank Gallop and David LeGrant, who voice the characters named Alpha and Beta. This episode concerns the letter X for exchange, featuring Quentin Reynolds, Phyllis Jill Baker from Northhampton, UK, and Gunne Ankerberg from Erebus, Sweden. Subject matter concerns UNESCO's worker exchange programme.