Present SimpleVersión en línea Present Simple por Liliya Zaripova 1 A mainframe supports multiple users at the same time. Written answer 2 A desktop PC has its own processing unit (or CPU), monitor and keyboard. Written answer 3 Laptops offer a lot of connectivity options. Written answer 4 PDA is a tiny computer for one hand. Written answer 5 Some wearable computers are voice-activated ones. Written answer