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Barbara - screen handling
Historical
Replaced by: Bocardo
Barbara was the screen handler before Bocardo was introduced. (The section names came later; Barbara was never called Barbara at the time.)
It used two separate HTML panes to represent the upper and lower windows of the Z-machine: a very imperfect match. However, it was fast: the most common operation, appending text to the lower screen, involved only two DOM operations (creating a new text node, and appending it to a (cached) position within the document).
Barbara's upper screen handler developed into Bocardo.