The Tektronix 4010 series was a family of text and graphics computer terminals based on the company’s storage tube technology. There were several members of the family introduced through the 1970s, the best known being the 11-inch 4010 and 19-inch 4014, along with the less popular 25-inch 4016. They were widely used in the CAD market in the 1970s and early 1980s.