Object Relational Mapping - xerocrypt/Misc GitHub Wiki
This is relevant to ASP.NET development, as Entity Framework is often used for data access.
Basically the whole idea of having an Object Relational Mapping solution is to enable the developer to work with database objects in the native application source rather than that of the data source. For example, Entity Framework enables the use of databases without the developer having to insert SQL statements into the source.
An ORM tool: Creates a model of the data source and maps data objects Loads an instance of this model when the application executes