ABSTRACTThis paper here proposes a theory of classification and evolution of technology based on taxonomic characteristic of interaction between technologies that is an under-studied field of research in economics of technical change and management of technology. The proposed classification of technologies, in a broad analogy with evolutionary ecology of parasites, within a theoretical framework of Generalised Darwinism, is: (1) parasitic technologies, (2) commensal technologies, (3) mutualistic technologies, (4) symbiotic technologies. This theory here suggests the property of mutual benefaction from interaction between different technologies and the theorem of not independence of any technology to explain and predict characteristics and evolutionary pathways of technologies over time. Overall, then, this study may be useful for bringing a new perspective in economics of innovation to categorise and analyse the interaction between technologies that can be a ground work for development of more sophisticated concepts to explain and predict the evolution of technology and generalise aspects of technological change in human society.