Integrated Healthcare Network. Also called IDN, IHDN, and IHS.

Invisible Hand Networks

Integrated healthcare network. In the USA, a business organization providing comprehensive healthcare. Composed of a number of hospitals, these organizations offer medical services over a wide area with the purpose of providing necessary medical care to the local community.

infectious hematopoetic necrosis, a viral disease that afflicts salmon and steelhead.

IHN is an acronym for "In His Name" which some people tend to use at the beginning of email. Those people believe that they should start each piece of writing with the name of God. According to Qur'an when Solomon wanted to write a letter he used the Basmala phrase.