b'PrefaceSince the first edition in 1923, the Sears List has served the unique needs of small andmedium-sized libraries, suggesting headings appropriate for use in their catalogs and providingpatterns and instructions for adding new headings as they are required. The successive editors of theList have faced the need to accommodate change while maintaining a sound continuity. The newand revised headings in each edition reflect developments in the material catalogued, in the use ofthe English language, and in cataloging theory and practice. The aim is always to make librarycollections as easily available as possible to library users.The Principles of the Sears List, which follows A History of the Sears List, is intended both as astatement of the theoretical foundations of the Sears List and as a concise introduction to subjectcataloging in general. The List of Commonly Used Subdivisions, which follows the Principles, lists,for the purpose of easy reference, every subdivision for which there is a provision in the List, nomatter how specialized. For every subdivision there is also an entry in the alphabetical List with fullinstructions for the use of that particular subdivision. There are also many examples of the use ofsubdivisions, emphasizing that the use of subdivisions is an essential method of expanding andadapting the List to a librarys particular needs.The Sears List of Subject Headings is also available as a database and as MARC records for directintegration with a librarys ILS. Ask your sales rep for more information.What is New in This EditionThis is the first edition of Sears List produced by Grey House Publishing, which acquired the title in2018. In addition to updating the look of Sears List with cleaner lines and more accessibletypography, the content is now also available as a free, online database that librarians can access, atno charge for one year. Grey House is pleased to welcome you to this new edition with its manynew and improved features.The major feature of this new edition of the Sears List is the inclusion of more than 1,600 new andrevised subject headings. New headings in this edition reflect the changing needs of library users,which includes addressing the growing literature in the areas of science, technology, engineering,and mathematics (STEM). The following are a sample of new STEM headings added since the lastedition: Androids, Environmental risk, Bioengineering, Graphic medicine, Traumatic braininjury, STEM education, Sinkholes, and more. With same-sex marriage reaching full legal statusin all 50 states in 2015, and some terms becoming pejorative, the Sears database updated a numberof LGBTQIA headings in 2016, including but not limited to: Asexual people, Transgenderteenagers, and LGBT people in the military. This edition also includes new headings for genres ofliterature and music, based on the genre/form approved by the Library of Congress in 2015. In theseand other areas many provisions have been added for creating more new headings as needed. Manyof the headings new to this edition were suggested by librarians representing various sizes and typesof libraries, by commercial vendors of bibliographic records, and by the catalogers, indexers, andsubject specialists at EBSCO Information Services.In addition to those new headings, the sixth edition of The Sears List Canadian Companion is nowfully incorporated into this edition of the Sears List. This incorporation included the expansion andA-7'