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Building Recommendation Engines by Suresh Kumar Gorakala

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Types of recommender systems

Now that we have defined recommender systems, their objective, usefulness, and the driving force behind recommender systems, in this section, we introduce different types of popular recommender systems in use.

Collaborative filtering recommender systems

Collaborative filtering recommender systems are basic forms of recommendation engines. In this type of recommendation engine, filtering items from a large set of alternatives is done collaboratively by users' preferences.

The basic assumption in a collaborative filtering recommender system is that if two users shared the same interests as each other in the past, they will also have similar tastes in the future. If, for example, user A and user B have similar movie preferences, ...

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