Talk:Mat release

Why is it called a mat release?
What’s the origin of the term? I’ve seen it as “MAT release” as well. Is it an acronym? Staffordk (talk) 10:25, 1 August 2018 (UTC)
 * Staffordk - that's a great question, I would love to know that myself! Chetsford (talk) 14:35, 14 August 2019 (UTC)