ICS Field
35.220.01 Data storage devices in general
35.220.10 Paper cards and tapes
35.220.20 Magnetic storage devices in general
35.220.21 Magnetic disks
Including flexible disks, diskettes, disk packs, disk cartridges, etc.
35.220.22 Magnetic tapes
35.220.23 Cassettes and cartridges for magnetic tapes
35.220.30 Optical storage devices
Including CD and magneto-optical devices (MO)
35.220.99 Other data storage devices