Quote: a typical Oberon viewer has a header frame giving a name and menu, and a main frame for the viewer's contents

Quotation Skeleton

In fact, the entire display, tracks and viewers … [in Oberon] … together with a (possibly empty) sequence of subframes. … Usually, a viewer consists of two subframes: a … containing the viewer's actual contents.   Google-1   Google-2

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Quote: Oberon display is organized into frames (a rectangular bit map with subframes)

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