Printers: Digital data can be produced on paper using virtually any one of the various types of printer devices, including dot matrix, ink jet, thermal, and laser printers. The production of color prints implies a substantial investment in order to achieve the quality of resolution attainable in relatively low cost black and white systems. The least expensive color technology is the thermal type, though the end product, while having the aesthetic appeal of a pointillist painting, may be of limited utility if high image resolution and accurate edge definition is required. As in other computer related fields, color printing technologies are advancing rapidly. The quality of color output will continue to improve dramatically even as the cost of the technology drops. Data Output