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One reason GUIs were initially slow to be adopted was the cost of the hardware needed to support them. How much video RAM is needed to support a $25-\text{line}\times\: 80-\text{row}$ character monochrome text screen? How much for a $1200 \times 900-$ pixel $24-bit$ color bitmap? What was the cost of this RAM at $1980$ prices $(\$5/KB)?$ How much is it now?

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