MDI (Multiple Document Interface) is a Microsoft Windows programming interface for creating an application that enables users to work with multiple documents at the same time. Each document is in a separate space with its own controls for scrolling. The user can see and work with different documents such as a spreadsheet, a text document, or a drawing space by simply moving the cursor from one space to another.

An MDI application is something like the Windows desktop interface since both include multiple viewing spaces. However, the MDI viewing spaces are confined to the application's window or client area . Within the client area, each document is displayed within a separate child window . MDI applications can be used for a variety of purposes - for example, working on one document while referring to another document, viewing different presentations of the same information, viewing multiple Web sites at the same time, and any task that requires multiple reference points and work areas at the same time

In the United States, a curriculum vitae is used primarily when applying for academic, education, scientific or research positions. It is also applicable when applying for fellowships or grants.

To put across a point with more effect.

To help trainees take more in - as mentioned above up to 75 % of knowledge or information is gained through sight.

To maintain interest.

To focus attention on one spot or in one place.

To break up a lecture, particularly every 20 minutes.

To help in the preparation of a talk - extensive preparation leads to a polished product.

To help keep both the speaker and the audience on track.

To aid memory by providing a summary.

To help standardise presentations involving a number of trainers at different locations.

To add variety.