Oki ML 590 Oki ML 590 Elite Oki ML 590 Series Oki ML 590 n Oki ML 591 Oki ML 591 Elite Oki ML 591 n Oki Microline 590 Oki Microline 590 Series Oki Microline 590 n Oki Microline 591 Oki Microline 591 n