Editing Five laws of library science (section)

===Fifth Law: A library is a growing organism===
The fifth law of library science, "A library is a growing organism," means that a library, like an [[organism]], should be a dynamic institution that is never static in its outlook. Ranganathan identified two types of growth: growth that increases the quantity of items in the library's collection, and growth that improves the collection's overall quality through the replacement of materials.{{sfn|Ranganathan|1957|p=30}} Books, methods, and the physical library should be updated over time. There needs to be a consideration of growing physical space, but in the 21st century this has come to mean the multiple formats and platforms a collection can encompass.<ref name=":0" />