ELMO is the name of the company most commonly associated with document cameras, and has become a the way that many refer to them, regardless of the manufacturer. (Like “Kleenex”, “Xerox”, or “TiVo” in their respective fields.)
Document cameras, also known as “digital overheads”, or “doc-cams”, are basically cameras mounted on arms and pointed down so they can capture images of paper or other objects. In turn, these images are displayed to a large audience using a projector.
Document cameras are typically used in classrooms or science labs and connected to video projectors. They replaced overhead projectors, which were formerly used for this purpose.
