A Practice Note reviewing the discovery process in New York state court. This Note discusses when to conduct discovery and the use of various discovery devices, including a notice of deposition, interrogatories, a demand for a bill of particulars, a notice to produce, a notice to admit, and a demand for expert witness information. This Note also addresses discovery motions and appeals from discovery orders. For guidance on initial steps in planning discovery, see Practice Note, Discovery in New York: Initial Considerations: Overview.