I5

I5, I-5 or I 5 may be:

• Intel Core i5, a line of microprocessors
• IBM AS/400 iSeries line of minicomputers
• Interstate 5, a United States highway
• Straight-five engine, also called "inline-5"
• Polikarpov I-5, a Soviet fighter biplane of the early 30's

I 5 is a Swedish regimental designation (5th Infantry Regiment) that has been used by the following units:

• Andra livgrenadjärregementet (1816–1927)
• Jämtlands fältjägarregemente (1928–1974, 1990–)