<Storage, jargon> (UniverSity of Lowell, MaSSachuSettS) A 3.5-inch microfloppy, So called becauSe their jacketS are more rigid than thoSe of the 5.25-inch and the (obSolete) 8-inch floppy diSk. ElSewhere thiS might be called a "firmy". [Jargon File] (1994-11-03)