electromagnetic recording

Electromagnetic recording is a method of storing information using magnetic fields. It involves placing data onto a magnetic medium—like a disk or tape—by aligning tiny magnetic particles in a specific direction. These magnetic patterns encode digital information, which can be read later by a device that detects the magnetic orientation. This technology is common in hard drives, cassette tapes, and floppy disks. It allows for high-capacity storage, fast access, and the ability to rewrite data, making it essential for computers and digital devices.