If you get the "Sorry, the file cannot be displayed. There seems to be a technical issue ..." error when trying to view an image, a workaround is to click on the cog icon in the upper right side of the media viewer, and then select "Disable Media Viewer". We are aware of the problem and are looking for a solution.


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The 4027 was the first color raster graphics terminal offered by Tektronix, introduced in 1978.


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It had a resolution of 640 × 350, or 80 × 34 characters.