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Invented by the founder of N.U.M.B. Knifeworks, the mechanism is featured on the brand's flagship folder, the N1.

One way to lock a Windows computer from your keyboard is by pressing Ctrl + Alt + Del and then selecting the "Lock" option.

To lock notes on your iPhone, you'll need to set up a master password, or allow your phone to use your Touch or Face ID to lock and hide notes.