The jihadist group which controls large swathes of territory in Syria and Iraq is sometimes referred to by different names by English-speaking governments and media.
When talking about the group - which has also spawned affiliates elsewhere in the Middle East, Africa and Asia - UN and US officials generally use the acronym "Isil", the acronym of "Islamic State in Iraq and the Levant".
The group itself has not used that name since June 2014 when it declared the creation a caliphate and shortened its name to "Islamic State" (IS) to reflect its expansionist ambitions.
Since then, BBC News has been using that term, but qualifying it as "Islamic State group" or "self-styled Islamic State" and shortening it to "IS" on subsequent mentions.
Other media have continued to use "Isil" or "Isis", which is based on the other widely used translations of the group's former name - "Islamic State in Iraq and Syria" or "Islamic State in Iraq and al-Sham".