Manuscript cultures based on Arabic script feature various tendencies in standardisation of orthography, script types and layout. Unlike previous studies, this book steps outside disciplinary and regional boundaries and provides a typological cross-cultural comparison of standardisation processes in twelve Arabic-influenced writing traditions where different cultures, languages and scripts interact. A wide range of case studies give insights into the factors behind uniformity and variation in Judeo-Arabic in Hebrew script, South Palestinian Christian Arabic, New Persian, Aljamiado of the Spanish Moriscos, Ottoman Turkish, a single multilingual Ottoman manuscript, Sino-Arabic in northwest China, Malay Jawi in the Moluccas, Kanuri and Hausa in Nigeria, Kabyle in Algeria, and Ethiopian Fidal script as used to transliterate Arabic. One of the findings of this volume is that different domains of manuscript cultures have distinct paths of standardisation, so that orthography tends to develop its own standardisation principles irrespective of norms applied to layout and script types. This book will appeal to readers interested in manuscript studies, sociolinguistics, literacy studies, and history of writing.