NLS

NLS is an acronym that can refer to several concepts across different fields. Among the most common are the nonlinear Schrödinger equation, the National Library Service for the Blind and Physically Handicapped, and National Language Support in computing.

The nonlinear Schrödinger equation (NLS) is a class of nonlinear dispersive partial differential equations used to model wave propagation in various physical contexts, including nonlinear optics, plasma physics, and fluid dynamics. In one spatial dimension with cubic nonlinearity, it takes a form that supports soliton solutions, stable localized waves that maintain shape while traveling. Higher-dimensional versions exhibit a range of behaviors, including dispersion, focusing, and potential blow-up, and the NLS is a central object of study in applied mathematics and mathematical physics.

The National Library Service for the Blind and Physically Handicapped (NLS) is a program of the Library of Congress in the United States. It provides free access to printed materials in accessible formats for eligible readers, including talking books on cartridge or digital formats and Braille books. Services are delivered through a network of cooperating libraries and lending agencies, with eligibility based on disability and age. The program aims to ensure broad access to information and literary content for people with print disabilities.

In computing, National Language Support (NLS) refers to features that enable localization and internationalization of software and systems. This includes locale data, character encoding and collation rules, date and number formats, and translation of user-visible messages. NLS facilities help software function correctly in different languages and cultural contexts.