Kwa chingwe chowongolera ndi chowongolera mumagetsi apakompyuta pamakompyuta, zida zowongolera zamagetsi, makina akuofesi kapena magawo owongolera, omwe amafunikira kutetezedwa ku kusokonezedwa ndi ma elekitiroma (EMI) ndi ma radiation a electromagnetic (EMR).