HP and 3M have partnered to produce business laptops with built-in privacy screens, the same sort of screens used at banks, hotels and other businesses to keep the contents on a monitor away from nosy people. These screens are available to purchase as independent items, but must be cut to fit an existing laptop’s display (or, perhaps, taped if you’re not concerned about style).

The idea is that business users might be doing something sensitive on their laptop that requires privacy; working on the plane, in a cafe, or other public places aren’t ideal, then. You could position yourself toward the wall, but that’s not always an option, and it still won’t prevent those who walk nearby from seeing what you’re doing.
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https://www.slashgear.com/hp-3m-team-up-for-laptops-with-built-in-privacy-screens-14409737/