Technology roadmapping has an established and proven track record for helping organizations with their strategy, long-term planning, innovation and foresight activities. Technology Forecasting & Social Change has played a leading role in disseminating research on roadmapping and, so, for its 50th anniversary issue, this paper provides a historical account of the emergence of roadmapping from the practices developed and deployed by technological-based organizations. Motorola, BP, Philips, EIRMA, Lucent Technologies and the Semiconductor Industry Association have all made significant contributions leading to the modern form that embodies a temporal, multi-layered, systems-based approach underpinned by the ‘market-product-technology’ structure (i.e. why-what-how). However, the industrial roots of technology roadmapping can be traced back to an earlier period, which is, as of yet, unacknowledged in the technology and innovation management literature. There is the overlooked or, perhaps, forgotten history where organizations such as NASA, Boeing, GE, Lockheed, USAF, Rockwell International and the U.S. Department of Energy initiated and advanced the practice of roadmapping – through this publication, their contributions will now be given the credit they so rightfully deserve.