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NLP & Language · intermediate · concept 121 of 311 · Updated Nov 4, 2026

Vector Databases

Specialized databases optimized for storing and searching high-dimensional vectors (embeddings). Enable fast similarity search, the backbone of RAG, recommendation systems, and semantic search.

Key terms

HNSWANN searchCosine similarityPineconeChromaDBWeaviate

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Where you meet it in the real world

RAG systems, recommendation engines, image search, semantic search