The scanning tunneling microscope (STM) has been hailed as the "key enabling discovery for nanotechnology," the catalyst for a scientific field that attracts nearly $20 billion in funding each year. In Instrumental Community, Cyrus Mody argues that this technology-centric view does not explain how these microscopes helped to launch nanotechnology--and fails to acknowledge the agency of the microscopists in making the STM and its variants critically important tools.