(Laser Servo-120) A high-capacity floppy disk from 3M, Compaq, Panasonic and O.R. Technology that was introduced in 1996, but never caught on. Using a dual-gap head that supported 120MB disks as well as standard 3.5" floppies, the technology recorded data magnetically, but used optical tracks in the medium to align the heads. LS-120 disks had 2,490 tracks per inch, compared to 135 tpi for the 1.44MB floppy. See SuperDisk, Floptical and magnetic disk.