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.
By Dean and Naomi Tuttle. Helen Adams Keller was born in Alabama in 1880. At the age of 18 months she experienced a fever that left her deaf, blind and unable to speak. An extremely intelligent and sensitive child, by the age of seven she had invented over 60 different signs by which she could talk to her family.