I12

I12 or I-12 may refer to:

I12 engine
Interstate 12, a road in the United States of America
Japanese submarine I-12

I 12 is a Swedish regimental designation (12th Infantry Regiment) that has been used by the following units:

Jönköpings regemente (1816–1927)
Norra Smålands regemente (1928–1974)

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