

Avolume is a physicalbook. It may be printed orhandwritten. The term is commonly used to identify a single book that is part of a larger collection. Volumes are typically identifiedsequentially withRoman orArabic numerals, e.g. "volume III" or "volume 3", commonly abbreviated to "Vol.".[1]
Volumes may be published directly, or they may be created out of multiplebound issues. For instance, a library that subscribes to aperiodical and wishes to preserve it typically takes a set of theissues and has them bound into a volume.[2][3] Apublisher may also separately publish a volume out of previously published issues; this is common withgraphic novels. A volume may also be composed of entries, as in anencyclopedia, or chapters, as in amonograph.
The term is also used as an identifier for a sequence of periodicals. This is generally based on a single calendar year, but not always. For instance, a school magazine might start each new volume at the beginning of the academic year or at the beginning of each term/semester. Likewise, a journal may start new volumes for each anniversary after its original inception. Thus, all issues published in theNth term or year will be classified under theNth volume.[1] The original function of labelling issues with a volume at publication time was to provide a standard way for libraries to later bind the issues into a physical volume.[2][3]
Apart (commonly abbreviated to "Pt.") can be a special sub-division of a volume or it can be the highest level division of a journal. Parts are often designated with letters or names, e.g. "B", "Supplement".[4]
rft.part […] Part can be a special subdivision of a volume or it can be the highest level division of the journal. Parts are often designated with letters or names, i.e. "B", "Supplement".