Library and information science (LIS) (sometimes given as the plural library and information sciences)or as "library and information studies") is a merging of the two fields library science and information science.
The phrase "library and information science" is associated with schools of library and information science (abbreviated to "SLIS"), which generally developed from professional training programs (not academic disciplines) to university institutions during the second half of the 20th century.
In the last part of 1960s schools of librarianship began to add the term "information science" to their names.
The first school to do this was at the University of Pittsburgh in 1964.More schools followed during the 1970s and 1980s, and by the 1990s almost all library schools in the USA had added information science to their names.
The trend was more for the adoption of information technology rather than the concept of a science.
Library and information science (LIS).
The study and practice of professional methods in the use and exploitation of information, whether from an institutional base or not, for the benefit of users.
An umbrella term and used to cover terms such as library science, librarianship, information science, information work etc