U21
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Script error: No such module "Side box".
U21 or U-21 may refer to:
- Script error: No such module "WPSHIPS utilities".Script error: No such module "Check for unknown parameters"., various vessels
- Template:INS, a sloop of the Indian Navy
- Script error: No such module "WPSHIPS utilities".Script error: No such module "Check for unknown parameters"., a submarine of the Austro-Hungarian Navy
Other uses
- Beechcraft U-21 Ute, an American utility aircraft
- Great rhombihexahedron
- Small nucleolar RNA SNORD21
- Universitas 21, an international network of research-intensive universities
- Uppland Runic Inscription 21