A wide variety of peripherals were available that worked on some or all of these models. The first line, introduced with the 4010, included the 4610 Hard Copy Unit, a graphics printer. This used a system in the monitor to scan the display line-by-line which was then sent to the printer where a one-line-tall CRT duplicated the image on thermal paper. Normally selling for $3,550, a $3,950 version allowed the printer to be shared among four terminals. The printer adaptor could be pre-installed in the 4010, making it the 4010-1, and it came pre-installed on both the 4012 and 4013 which do not appear to have used the -1 notation to indicate this. The 4631 was a version of the 4610 with a sheet feeder and higher speed. A properly equipped 4014 could also drive a plotter through an expansion card, including the GPIB-based 4662 Interactive Digital Plotter and 4663 C-sized version. Plotters offered colored pen selection, which could be embedded in the graphics data.