The overhead projector, specifically used for presentations, has transformed many spheres that rely on a structural presentation format. There are two different settings I would like to discuss.
The business setting has seen a radical transformation in presentation styles. An old-style easel with flip pages was the standard for a time. However, with the increasing need for strong, visual sales presentations, powerpoint presentations became the new standard. The ability to insert charts, graphs, pictures with ease and speed quickly gave the overhead video projector a one up.
The classroom setting is another place where this comtech has exploded. Few professors and teachers rely on anything less than a powerpoint presentation, and, consequently, expect nothing less than that from students.
Overall, Jacques Ellul's theory comes to mind in reference to image and truth. This method of presentation and communication brings both into effect. We definitely see the importance of image within this comtech. In the classroom, we are so used to digesting text and lecture that a picture can be a soothing presence to our mind. While we are flooded with truth, a picture can bring it back to reality. In the business world, charts and graphs provide a reality to the numbers. A picture of the product can induce more feelings and prove more persuasive than any sales demo.
However, Neil Postman's question about new problems being created is interesting to consider. I have noticed this in my own class presentations. Students are becoming more reliant on the ppt structure to lead their presentations. There is no need to memorize the information when you have an outline right in front of you. This comes up most apparently when there is a lack of fluid transitions. There is an abrupt shift in thought and speech when the slide is switched. Obviously, good students will still realize the importance of their oral presentation. That is one problem this comtech has created.
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