PROMPT originally consisted of six 16-inch diameter fully automated, or robotic, optical telescopes at Cerro Tololo Inter-American Observatory (CTIO) in Chile.The University of North Carolina at Chapel Hill (UNC-CH) began building “PROMPT” and “Skynet” in 2004, supported primarily by NSF. Skynet is PROMPT’s control software, as well as sophisticated web-based, dynamic queue-scheduling software. Skynet has opened PROMPT to tens of thousands of users, and is capable of controlling scores of telescopes simultaneously, including most commercially available small-telescope hardware. In partnership with other institutions, Skynet has enabled us to grow PROMPT into a network of small, robotic telescopes. The Skynet Robotic Telescope Network now numbers 19 optical telescopes between 14 and 40 inch