Ngophawu kunye nentambo yokulawula kwiinkqubo zombane zekhompyuter, izixhobo zokulawula i-elektroniki, umatshini weofisi okanye iiyunithi zolawulo lwenkqubo, efuna amandla aphantsi kunye nokukhuselwa kwi-electromagnetic interference (EMI) kunye neradiation ye-electromagnetic (EMR) kunye nomsi ophantsi we-zero halogen kunye nemfuneko yokubuyiswa komlilo.