This is the home page of the NEURON simulation environment, which is used in classrooms and laboratories around the world for building and using computational models of neurons and networks of neurons. Here you will find installers and source code, documentation, tutorials, announcements of courses and conferences, and discussion forums about NEURON in particular and computational neuroscience in general. Users who have special interests and expertise are invited to participate in the NEURON project, e.g. by helping to organize future meetings of the NEURON Users' Group, or by participating in collaborative development of documentation, tutorials, and software. We also welcome suggestions for ways to make NEURON a more useful tool for research and teaching.