IN, In or in may refer to:
The International Standard Book Number (ISBN) is a numeric commercial book identifier which is intended to be unique.
India (official name: the Republic of India; Hindi: Bhārat Gaṇarājya) is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world.
Insects or Insecta (from Latin insectum) are hexapod invertebrates and the largest group within the arthropod phylum.
Indonesia ( (listen) IN-də-NEE-zhə, -NEE-zee-ə; Indonesian: [ɪndoˈnesia]), officially the Republic of Indonesia (Indonesian: Republik Indonesia [reˈpublik ɪndoˈnesia]), is a country in Southeast Asia, between the Indian and Pacific oceans.
An International Standard Serial Number (ISSN) is an eight-digit serial number used to uniquely identify a serial publication, such as a magazine.
The Internet (portmanteau of interconnected network) is the global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link devices worldwide.
An independent or nonpartisan politician is an individual politician not affiliated with any political party.
Instagram (also known as IG or Insta) is a photo and video-sharing social networking service owned by Facebook, Inc.