Foundations and Trends in Information Retrieval publishes survey and tutorial articles on the following topics:Applications of IRArchitectures for IRCollaborative filtering and recommender systemsCross-lingual and multilingual IRDistributed IR and federated searchEvaluation issues and test collections for IRFormal models and language models for IRIR on mobile platformsIndexing and retrieval of structured documentsInformation categorization and clusteringInformation extractionInformation filtering and routingMetasearch, rank aggregation and data fusionNatural language processing for IRPerformance issues for IR systems, including algorithms, data structures, optimization techniques, and scalabilityQuestion answeringSummarization of single documents, multiple documents, and corporaText miningTopic detection and trackingUsability, interactivity, and visualization issues in IRUser modelling and user studies for IRWeb search.