A Model 33 cost about $700, much less than other teleprinters and computer terminals at the time, such as the Friden Flexowriter and the IBM 1050. Early video terminals, such as the Tektronix 4010, did not become available until 1970 and cost around $10,000. However, the introduction of integrated circuits and semiconductor memory later that decade allowed the price of cathode-ray-tube-based terminals to fall below the price of a Teletype teleprinter. Teletype machines were gradually replaced in new installations by dot-matrix printers and CRT-based terminals in the middle to late 1970s. Basic CRT-based terminals, which could only print lines and scroll them, are often called glass teletypes to distinguish them from more sophisticated devices.