# Compatibility with OLE 1 and 16:32-Bit Interoperability

Note In moving from OLE 1 to OLE 2, the following changes in terminology were made:

- The OLE 1 term “server application” has been changed to “object application.”

- The OLE 1 term “client application” has been changed to “container application.”

Compatibility implies that an OLE 1 client application can contain OLE 2 embedded and linked objects and that an OLE 1 server application can create objects to be embedded in and linked to by OLE 2 containers. OLE provides these capabilities by means of a built-in compatibility layer in the core code, which includes a set of functions for conversion.

Interoperability is not the same as OLE 1 to OLE 2 compatibility. Interoperability implies that a 16-bit OLE application can interact with a 32-bit application running on the same system. Interoperability between 16- and 32-bit implementations means that 16-bit and 32-bit implementations can call each other.