This book constitutes the proceedings of the Fourth International Conference on Analysis of Images, Social Networks and Texts, AIST 2015, held in Yekaterinburg, Russia, in April 2015.

The 24 full and 8 short papers were carefully reviewed and selected from 140 submissions. The papers are organized in topical sections on analysis of images and videos; pattern recognition and machine learning; social network analysis; text mining and natural language processing.

This book constitutes the proceedings of the First International Workshop on Language, Music and Computing, LMAC 2015, held in St. Petersburg, Russia, in April 2015.

The 13 papers presented in this volume were carefully reviewed and selected from 38 submissions. They were organized in topical sections on music and language in education; corpus studies of language and music; problems of notation; and linguistic studies of music.