OSP explained

OSP or Osp may refer to:

Places

Outer surface proteins (Osp), expressed in the outer membrane of some gram-negative bacteria, particularly Borrelia burgdorferi

Oblate Sisters of Providence, a Roman Catholic women's religious institute
Office of Special Plans, a U.S. intelligence unit (2002–2003)
Onafhankelijke Socialistische Partij (Independent Socialist Party), a revolutionary socialist political party in the Netherlands
Orchestra of St Paul's, a professional chamber orchestra resident at the Actors' Church, London
Oregon Star Party, an annual event in the United States for observational astronomy
Oregon State Police, an American law enforcement agency

Online service provider, a supplier of internet content
Open Settlement Protocol, a standard for ISPs to exchange information on IP telephony
Open Source Physics, a project to encourage open source code libraries for numerical simulation
Open Specification Promise, a legal statement concerning use of Microsoft intellectual property
Open Syllabus Project, an open-source syllabus database
OpenShot, a free and open-source video editor for Windows, macOS, Linux, and ChromeOS
Operating System Projects, an environment for teaching about computer systems
Orbital Space Plane, a NASA concept to support the International Space Station
Organic solderability preservative, a method for coating printed circuit boards
Outside plant, the telecommunications or electrical cabling between supplier and customer