Also known as rucksack, packsack, pack, schoolbag, book bag, knapsack, Tas Ransel, Tas
thumb|right|A 30 L top and bottom-loading hiking backpack thumb|right|A 12 L front-loading photography backpack
A backpack is a bag worn on the back with straps that go over the shoulders, designed to carry items while keeping the wearer's hands free. It matters because it's a practical and convenient way to transport goods for activities like hiking, photography, school, and travel.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).