The 2016 NEURON Summer Course, which will be held at the HHMI|Janelia Research Campus in Ashburn, Virginia, is now open for registration. The course has two components, which can be taken individually or together depending on your needs and experience with NEURON. NEURON Fundamentals runs from June 20-24. This component presents a thorough introduction to computational modeling of neurons and networks of neurons with NEURON, and introduces parallel simulation. It is suitable for individuals at all levels of expertise. Parallel Simulation with NEURON runs from June 25-27. This component focuses on the needs of experienced NEURON users who want to create models that will run on parallel hardware, and presumes knowledge of how to write hoc or Python code for NEURON. You may apply for one or both components, but registration is subject to approval by the course's faculty. Space is limited, and applications will be considered in the order received. The application deadline is Friday, May 20, 2016. No applications will be accepted after that date, and there will be no on-site registration. For more information and the on-line application form, see http://www.neuron.yale.edu/neuron/static/courses/summer2016/summer2016.html --Ted