Why is there a dot on 5 on phone pad & remote control?

If you happen to observe the phone pad or remote control, you would often find a dot or some kind of elevation only on the number '5'. This can be felt best if you feel phone pad while being in the dark room and this is the exact reason why it was made. It was made to facilitate blind people and since every number on the phone pad except 0 is connected to 5 as 5 is in the central place, so it can act as a guide to locate where the other numbers are present.

The same feature is also found in computer keyboards though not all keyboards have a dotted 5 but the letters "J" and "F" are marked with some elevation or bar and it serves the same purpose to help blind people.


Written by Dr.Muhammad Wasif Haq, Karachi, Pakistan.


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