Other
- Cluster bomb, air-dropped or ground launched shells
- Cluster diagram, general type of diagram, which represents some kind of cluster
- Clusters School of Digital Arts, an animation and visual effects training school
- Business cluster, a geographic cluster of competitive businesses
- Cluster (novels) by Piers Anthony
- Cluster home, a type of housing development
- CLUSTER Consortium Linking Universities of Science and Technology for Education and Research
- Honey Nut Clusters, a breakfast cereal
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