What should we understand by information technology (and some hints at other issues)?

Information science has been convincingly characterised as a response to developments in information and communications technologies and as part of the gestalt of the computer. Despite this, it has had a limited understanding of information technology and has repressed or disguised its origins. Its understanding of itself and its potential for contribution to other discourses has thereby been restricted. The paper develops an understanding of information technology. The idea that the computer as a machine is concerned with the transformation of information, not material or energy, is extended to other information technologies. Technology is regarded as a radical human construction, in a position derived from Marx and mediated by economics. On these bases, an understanding of information technology as a form of knowledge concerned with the transformation of signals from one form or medium into another is proposed. Invention, innovation, and diffusion are distinguished as stages in the development of technologies. For modern information technologies, the history of copyright can provide indicators for innovation and diffusion. The mid‐ to late 19th century, in the United States and between the United States and Europe, is identified as the critical period for diffusion. An explanation for this is proposed in terms of the dynamism of the period, its hospitality to innovation, and in the United States continental expansion and developing links with Europe.