Look up viewer in Wiktionary, the free dictionary.

Things known as a Viewer include:

• For television viewers, see ratings or Nielsen ratings
• File viewer, a piece of computer software that displays the data stored in a computer file in a human-friendly form.
• Image viewer, a computer program that displays a stored graphical image.
• Pocket viewer, a model range of Personal Digital Assistants developed by Casio
• ViEWER, a computer program written for the purposes of studying visual perception in a 3-D environment

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