article_snippet.sent: Some of black boxes used wire, metal foil, or continuous magnetic tape for recording.
article_snippet.sent: Older models of black boxes relied on tape and magnetic wire, eventually progressing to tape following technological advances .
article_snippet.sent: Over the years our Transportation Safety Board (TSB) used magnetic wire and foil.
article_snippet.sent: And magnetic tape which fell into a slot in a box so it wouldn't get stuck on a reel.