Dust, animals, toys, liquids, etc. can all damage the internal parts of a computer if the hard shell of a computer case doesn't enclose them and keep them away from the outside environment.
Ngwurugwu, anụmanụ, ihe eji egwuri egwu, ihe ọṅụṅụ, na ihe ndị ọzọ nwere ike imebi akụkụ nke kọmputa ma ọ bụrụ na akpụkpọ ụkwụ dị na kọmpụta anaghị emebi ha ma mee ka ha pụọ n'èzí.