Arabic Collections Online (ACO) is a publicly available digital library of public domain Arabic language content. ACO currently provides digital access to 17,262 volumes across 10,148 subjects drawn from rich Arabic collections of distinguished research libraries.

For this digitization project, rare books include materials that are outside of copyright as well as several of MEI's out-of-print publications.

Ircica, Farabi Ditital Library, Sayısal Kütüphane. Includes Yearbooks; Koran, calligraphy, photographs, manuscripts, and other collections.