Magnabelt was a magnetic belt format for dictation, introduced by IBM in 1961 with the IBM Executary 214 dictation machine. The belts were made of mylar with a ferromagnetic material deposited on its recording surface.
Early Executary models used a 4-inch wide belt, while later ones used 3-inch belts. Both desktop and portable models were available.
IBM manufactured Executary machines until 1972.