I5

I5, or I 5 may be:

*IBM AS/400 "iSeries" line of minicomputers
*i5 an early 2000 girl group
*Interstate 5
*Straight-5 or "inline-5" engine

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–)