I5

I5, I-5 or I 5 may refer to:

Computing

 * Intel Core i5, a brand of microprocessors
 * i5, an IBM AS/400 line of minicomputers
 * i5/OS, previous name of the IBM i operating system

Military

 * JSUB I-5, a 1931 Junsen type submarine
 * Polikarpov I-5, a Soviet fighter biplane of the 1930s
 * I 5, a Swedish regimental designation (5th Infantry Regiment) that has been used by the following units:
 * 2nd Life Grenadier Regiment (1816–1927)
 * Jämtland Ranger Regiment (1928–1974, 1990–1994, 2000–2004)

Transportation

 * Interstate 5 (I-5), a US highway
 * Inline-five engine, or straight-five engine
 * AirAsia India (IATA code)
 * General Electric I-5, the "industrial" model of GE's Elec-Trak electric tractor
 * The electric version of the BMW 5 series, BMW I5

Other uses

 * I5 (girl group), American band in 2000-2001
 * Inferior Five, fictional superhero group from DC Comics