The acronym "ISP" stands for Internet Service Provider. An ISP is a company that provides individuals and organizations access to the Internet. They facilitate connectivity through various technologies, such as DSL, cable, fiber optic, or satellite. In addition to providing access, ISPs often offer other services such as email hosting, web hosting, and domain registration. The choice of ISP can impact internet speed, reliability, and customer support options, making it a critical aspect of internet connectivity.