It is a modern equivalent of the slide projector or overhead projector. McCain referred to it as an overhead projector. There is also a group study room furnished with an overhead projector. Opaque projectors are not as common as the overhead projector. Each classroom is equipped with a digital and an overhead projector. The steganographic mirror possibly came closest to how the overhead projector was used. Inc. It is designed for overhead projector use. Portable and desktop models allow a similar working environment to that of an overhead projector. A simple example is an overhead projector transparency. It can be the use of the overhead projector, student response clickers, etc. Every classroom in the school is equipped with a computer, overhead projector, and Smartboard. These are then placed on an overhead projector for display to an audience. The trainee should use more than one media, for example PowerPoint, Flipchart and Overhead projector. The first overhead projector was used for police identification work. Allied facilities such as overhead projector, slide projector, Xeroxing M/c and fax m/c, is available.