O

Object Identifier (OID)

A number that uniquely identifies an object class or attribute, along with the object’s definition. One of the most common uses for the OID is as part of the ASN.1 language. OIDs are issued by a central agency normally called a National Registration Authority (NRA). Each country has its own NRA. The NRA in the United States is the American National Standards Institute (ANSI). Every entity that requests an OID receives a root OID that can be used to create additional OIDs for individual objects. For example, Microsoft has an OID of 1.2.840.113556. Microsoft has added branches to this OID for a variety of purposes within Windows. For example, there’s one OID for Active Directory classes and another for Active Directory attributes. A specific OID example is the IPSEC-Data object with an OID of 1.2.840.113556.1.4.623. As you can see, branches are added using a dot syntax.

OID

See Object Identifier

Open Software Foundation (OSF)

A standards group responsible for defining communication standards such as the Distributed Computing

Environment (DCE) and Remote Procedure Call (RPC) used by both DCOM and CORBA. The OSF is now part of The Open Group.

OSF

See Open Software Foundation