Lease system -- See Convict labor Here are entered works on the private employment of convicts. Works on the employment, by one employer, of laborers under contract with another employer or with a contractor, and on the lending of laborers by one employer to another employer are entered under Contract system (Labor).
Least developed countries -- See Developing countries Here are entered comprehensive works on those countries having relatively low per capita incomes.This heading may be subdivided by those topical subdivisions used under names of regions, countries, etc., e.g. Developing countries--Economic conditions, and may be used as a geographic subdivision under those topics authorized for local subdivision, e.g. Technology--Developing countries.
Least restrictive environment -- See Inclusive education Here are entered works on the education of exceptional children in age-appropriate, heterogeneously grouped classrooms. Works on bringing exceptional children into frequent contact with nonexceptional children and placing them in regular educational programs whenever possible are entered under Mainstreaming in education.