Ngwaahịa anyị bụ isi gụnyere ihe nleba anya nke akụkụ, ihe nlegharị anya mgbanwe, usoro ule mmanụ mgbanwe, usoro ule voltaji dị elu, usoro nnwale ngwaahịa nchekwa, sistemu ebe mmejọ eriri USB, nnwale mgbanaka & microcomputer, wdg.