ISL
Isl (or isl) is a common abbreviation for "island" or "islands".
ISL may also refer to:
- Iceland, a Nordic European island country
- In-situ leach, a mining technique
- Independent Socialist League, a defunct Trotskyist group in the United States (originally called the "Workers Party")
- Inter-Switch Link (disambiguation), a specially configured connection between network equipment
- Cisco Inter-Switch Link, a proprietary Cisco VLAN trunking protocol
- Intercon Security, a security firm
- International Socialist Left (Germany) (German: internationale sozialistische linke), a Trotskyist group in Germany
- Irish Shipping Limited, an Irish state-owned deepsea shipping company formed during World War II
- Lyapunov stability in mathematics, from the phrase "[i]n the [s]ense of [L]yapunov"
Education and research
- Illinois Security Lab, a research laboratory at the University of Illinois at Urbana-Champaign
- Independent School League (disambiguation), independent high school athletic conferences in the United States
- Institute of State and Law, a Russian legal think tank affiliated with the Russian Academy of Sciences
- International School of Louisiana, a charter school system in the United States
- International School of Lusaka
- International School of Luxembourg, a privately owned non-profit school in Luxembourg
Languages
- Icelandic language (ISO 639-2 tag: ISL), a language spoken in Iceland
- Indian Sign Language or Indo-Pakistani Sign Language (IPSL) also known as sign language of the deaf community in India
- International Sign Language, an international auxiliary language
- Irish Sign Language, the sign language of Ireland
- Israeli Sign Language, the most commonly used sign language within Israel's deaf community
Sport
- Indonesia Super League, the top-tier competition for football clubs in Indonesia
- Ice Hockey Superleague, a British-based ice hockey league that existed between 1996 and 2003
- International Sport and Leisure, a bankrupt Swiss sports marketing company that was closely affiliated with FIFA and the IOC
- Indian Super League, a professional football-club league based in India.
- Iranian Super League (disambiguation), the Iranian professional basketball, futsal or volleyball leagues
- Island Soccer League, a professional six-a-side association football league based in Bermuda