The multimedia material is now also available online. Survey Articles The books feature descriptive survey articles that are authored by widely acclaimed specialists in the field and that cover all main national standard varieties, distinctive regional, ethnic, and social varieties, major contact varieties, as well as major ESL varieties; share a common core, which makes them invaluable research tools for cross-linguistic comparisons; provide information on the historical and cultural backgrounds as well as the current sociolinguistic situations in the respective regions; serve as state-of-the-art reports on major issues in current research. CD-ROM The CD-ROM not only supplements the printed volumes through interactive access to the varieties but also provides a comprehensive database with: a unique collection of speech recordings of English from around the world; sound samples that open new perspectives on the varieties of English, as speech recordings also constitute the central aspect of research - students as well as professional academics will feel encouraged to use the material for new investigations; interactive and synchronized maps that allow either phonological or morphosyntactic (grammatical) comparisons; extensive bibliographies on the relevant research literature; links to pertinent websites.