Description of Resource: 
A hard disk uses rigid rotating platters. It stores and retrieves digital data from a planar magnetic surface. Information is written to the disk by transmitting an electromagnetic flux through an antenna or write head that is very close to a magnetic material, which in turn changes its polarization due to the flux. The information can be read back in a reverse manner, as the magnetic fields cause electrical change in the coil or read head that passes over it.
Address: 
United States
Is there a fee: 
No
Sector: 
Public or private: 
Public
Website or physical archive: 
Website only