Recommender system

A recommender system that receives an input at a first timepoint from a user device, the input comprises a unique user identity, and is indicative of a user-intent to initiate a recommendation generation process. A user profile is acquired based on the unique user identity. The user profile includes a set of term-weight data pairs for a number of terms which are derived from a plurality of searches performed at the user device before the first timepoint, and a plurality of user interactions of the user on the user device. A first set of coherent terms is selected based on weight values and a specified set of rules. A search query is generated based on the selected first set of coherent terms and a second set of coherent terms, wherein the second set of coherent terms are derived based on a concept-tree data structure. A set of data items are retrieved in a plurality of different formats from a plurality of different online or offline data sources, and displaying of the retrieved set of ...