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An Internet service provider (ISP) is a company that provides access to the Internet and related services.

Internet Service Provider (Wikipedia)
Internet connectivity options from end-user to tier 3/2 ISPs

An Internet service provider (ISP) is an organization that provides services for accessing, using, or participating in the Internet. Internet service providers may be organized in various forms, such as commercial, community-owned, non-profit, or otherwise privately owned.

Internet services typically provided by ISPs include Internet access, Internet transit, domain name registration, web hosting, Usenet service, and colocation.

Local ISP in Manhattan installing fiber for provisioning Internet access
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