Example image of eyePlorer eyePlorer map for 'Hard disk drive': Hard disk platter Magnetism Non-volatile memory Accountancy Computer Embedded system Network-attached storage RAID Storage area network Camcorder Digital audio player Digital video recorder Mobile phone Nokia N91 Personal digital assistant Video game console Bit Ferromagnetism Cobalt Iron(III) oxide Disk read-and-write head Stepper motor Voice coil Micrometre Crystallite Polycrystal Magnetic domains Dipole Magnetic field Electromagnet Electromagnetic induction Thin film Magnetoresistance Giant magnetoresistance Spintronics Ruthenium Perpendicular recording Error detection and correction Reed–Solomon error correction Low-density parity-check code Shannon–Hartley theorem S.M.A.R.T. G-force Magnet Neodymium magnet Loudspeaker Floppy disk Terabyte Desktop Gigabyte