Since it is a 12 digit number, there are chances of mistakes in day to day life. However, ISO has introduced the check digit, using which one can identify the correctness of the ISIN number. The check digit helps in identifying the errors in previous 11 bits.
Helen Adams Keller (June 27, 1880 â June 1, 1968) was an American author, political activist, and lecturer.
As a name that is known worldwide, Helen Keller is a symbol of courage and hope. Yet, she is much more than a name or a symbol. She was a woman of astounding intelligence, unwavering determination, unbelievable courage and insurmountable achievement.