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- Collector - in electronics, the amplified terminal on a Bipolar junction transistor (PNP) or (NPN)
- Collector in energy. By means of absorbers, the collector converts solar radiation into heat which can be used for public space or domestic hot water heating. Along with storage tank and sensors, the solar collectors are the most important components of a solar thermal system.
- Collector - in law: bill collector, debt collector.
- Collector - administrative head of a district in colonial India.
- List of collectors- People with note-worthy collections.
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de:Kollektor
fr:Collecteur
ja:コレクター