DOS 1.x (1981) had no explicit memory management support. It was designed to run primarily on machines with 64K RAM or less, or not too much more (the original PC could not have more than 64K RAM on the system board, although RAM expansion boards did exist). A COM program could easily access (almost) 64K memory when loaded, and many programs didn’t rely on even having that much. In fact the early PCs often only had 64K or 48K RAM installed. But the times were rapidly changing.
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Ziff Davis bought Ookla for $15 million in 2014. Reuters notes that the division seized on the 5G rollout and a surge in pandemic-driven bandwidth demand to boost its impressive return on the investment. (Connectivity generated a whopping $231 million in 2025.)
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