The first review of the spectrum of holographic scanning techniques. Explains prinicples of scanning designs and surveys current work of investigators in the field. Organizes design options functionally for easier comparison and fulfilment of design objectives. The comprehensive approach to scanned resolution provides a unified interpretation for holographic and conventional techniques. Describes remote sensing, display imaging, information handling, business graphics, and view and data storage. Also introduces a new analytic tool: the Conformal Ray Surface, which allows rapid heuristic appreciation of otherwise complex spatial functions. Illustrated.