ViewSonic Tablet PC price in India. Viewsonic is a California based maker of visual technology products like CRT monitors, LCDs, projectors. While many leading electronic manufacturers have entered the Tablet PC market, Viewsonic has been manufacturing Tablet PCs from the very early years of 2001. So it is amongst the earliest entrants in the Tablet PC market. Compare ViewSonic Tablet PC features side by side with other Tablet PCs.