he most common scenario is that there is one specialist library for the
blind in each country, or sometimes there are a few such libraries, specializing in providing books in different accessible formats or meeting the
needs of different audiences (children,students,etc). Eitherway , there
is alimited number of providers because there are economies of scale in
making and managing specialist collections for an audience that is relatively small and dispersed. The transformation of print materials into accessible formats imposes a high requirement for specialist equipment and
skills, and so it is usually more economical to manage services centrally.