Last night, on my way to home in office cab, had a chance to interact with my Office’s telephone operator. He is a nice guy who I have spoken with much on phones and did not meet him till last night. Our conversation centered around how EPABX system works, hunting lines etc; I was the one to ask him many questions as I always wanted to know the nuances of a telephone operator’s job. We stopped at a local tea shop for a cuppa and continued the conversation. Suddenly, he asked me the significance of the dot in the number five key on my phone’s keypad. I replied in the negative and he helped me understand that the dot in the keypad on any phone is to help the blind. It can be touched and felt so that the other numbers surrounding it can be easily punched. I was surprised and thanked him for the good information he lent. The journey continued and I tried punching the numbers with my eyes closed and Bingo! I was successful.
I really appreciate the goodwill of the guy who invented this tactic keeping the blind in mind. After all it is usability everyone yearns for without their knowledge. 
P.S.:- Am I the only to know this little but important thing too late? 
