A looseleaf service is a popular type of legal resource which brings together a variety of types of information concerning a particular topic or area of law. A looseleaf service is so called because it is made up of pages or pamphlets filed in looseleaf binders, often a multi-volume set. This format allows current information to be easily added to the existing materials. The ease of updating the binders allows supplementation to be added frequently, even weekly in some cases. Most looseleafs are now available online.