ISL

There are several expansions of the abbreviation ISL:

• International Sign Language
• Formally,* Informally, ISL can refer to Irish Sign Language
• More formally, ISL is the SIL code for Israeli Sign Language
• A Trotskyist group in Germany, International Socialist Left (internationale sozialistische linke, isl)
• ISL is the NATO country code for Iceland
• In mathematics, i.s.L. can stand for in the sense of Lyapunov
• In resources mining, ISL stands for In-situ leaching, a mining technique.
• In reference to a Storage Area Network, and switched networks ISL stands for Inter-Switch Link (disambiguation)
• Cisco Inter-Switch Link, a proprietary Cisco VLAN trunking protocol
• Ice Hockey Superleague, British based league (1996–2003)
• Illinois Security Lab
• Indonesia Super League, top-tier competition for Indonesian football clubs
• Institute of State and Law, leading Russian legal think tank, affiliated with the Russian Academy of Sciences.
• Independent Socialist League
• Intercon Security, a security firm
• International School of Luxembourg
• International Sport and Leisure, a Swiss sports marketing company that was closely affiliated with FIFA
• Island Line (disambiguation)
• Iranian Super League (disambiguation), the Iranian professional leagues in either basketball, futsal or volleyball
• Irish Shipping Limited
• Island Soccer League
• Icelandic language, a language spoken in Iceland (ISO 639-3, isl)

Independent School League (disambiguation):

• Boston area Independent School League, a group of 16 New England preparatory schools.
• Washington, DC area Independent School League, a group of 17 Washington, DC area preparatory schools.
• Illinois Independent School League, a group of 9 Chicago area preparatory schools.