India, Oct. 16 -- Have you ever run your fingers across a computer keyboard and noticed that the F and J keys feel slightly different from the others? Those tiny raised bumps are easy to overlook, but they are not there by accident. This small design detail has an interesting purpose that many people may never have stopped to think about. (Also read: Everyday explained: Ever wondered why jeans have small metal buttons on their pockets? Here's what they are used for )

On most standard QWERTY keyboards, the F and J keys have small raised markings that can be felt with your fingertips. These markings are not decorative additions; they serve a specific function in the way people interact with their keyboards.

According to a report by PCWorl...