Individual Integrated Fighting System
The Integrated Individual Fighting System (IIFS), often appropriated as "Individual Integrated Fighting System" in unofficial contexts, is a load-carrying equipment and existence system. It was introduced in 1988 as a possible replacement for the All-purpose Lightweight Individual Carrying Equipment (ALICE) system, itself employed by the United States military since 1973.
Source: Wikipedia — Individual Integrated Fighting System (CC BY-SA 4.0)