ISP commonly refers to an Internet service provider.
ISP, isp, or Isp may also refer to:
Places Islip railway station (Network Rail station code ISP), England Long Island MacArthur Airport (IATA Airport code ISP), New York, US
Education Information Society Project, at Yale Law School Institute of Southern Punjab, a university in Pakistan Instituto Superior Politécnico, a university in São Tomé and Príncipe Institut supérieur de philosophie, the Higher Institute of Philosophy in Louvain-la-Neuve, Belgium Integrated science program, an honors program at Northwestern University International School of Panama International School of Paris, France International School of Prague, Czech Republic International Science Programme, a program at Uppsala University for research support in basic sciences for low-income countries Petnica Science Center (Istraživačka Stanica Petnica)
Organizations and agencies Independence for Scotland Party Independent Socialist Party (disambiguation), in several countries ISP Sports, US marketing and broadcast company National Inspectorate of Strategic Products (Sweden) () Integrated Service Provider, a type of logistics services firm Intesa Sanpaolo, Italian bank Sovereign and Popular Italy (Italia Sovrana e Popolare), Italian political party
Law enforcement Idaho State Police Illinois State Police Indiana State Police Iowa State Patrol Iowa State Penitentiary, Fort Madison, Iowa, US
Science and technology Computing Image signal processor In-system programming, of programmable logic devices in-circuit Information Systems Professional, an information technology title and post-nominal Interface segregation principle, a principle of object-oriented design Internet service provider, an organization that provides services for accessing, using, or participating in the Internet ISP Formal Verification Tool, a verification tool for MPI (Message Passing Interface) programs
Other uses in science and technology Imperial smelting process, in zinc smelting Polarization in astronomy, interstellar polarization Specific impulse (Isp), a measure of rocket and jet efficiency