As noted earlier, its Related Pins recommender system drives more than 40 percent of user engagement. However, trying to stuff that into a user-item matrix would cause a whole host of problems.

An interactive recommender system using a novel, drag-and-drop user interface and a fast, client-side recommender. Project from 2012 - present Sibyl is a fast, interactive recommender system that ...

Naji Ahmad Albatayneh, Khairil Imran Ghauth, Fang-Fang Chua, Utilizing Learners’ Negative Ratings in Semantic Content-based Recommender System for e-Learning Forum, Educational Technology & Society, ...

A new approach to recommender algorithms, hidden behind proprietary walls, could help digital platforms filter content more carefully.