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 (I<sub>sp</sub>), a measure of rocket and jet efficiency