ISP is the airport code of Long Island, Islip, NY - Mac Arthur in the USA
Other definition:
Deutsch: Internetdienstanbieter / Español: Proveedor de servicios de Internet / Português: Fornecedor de acesso à Internet / Français: Fournisseur d'accès à internet / Italiano: Internet Service Provider
An Internet service provider (ISP) is an organisation that offers users access to the Internet.