A Practice Note explaining the key issues to consider before serving interrogatories in Massachusetts civil litigation. This Note discusses the purposes of interrogatories, Massachusetts Rule of Civil Procedure 33 and other relevant authorities, who can serve and be served with interrogatories, when to serve interrogatories, the limit on the number of interrogatories, the use of subparts, the permissible scope of interrogatories, and the different types of interrogatories. This Note also compares interrogatories to other discovery methods.