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.
Born physically normal in Tuscumbia, Alabama, Helen Keller lost her sight and hearing at the age of nineteen months to an illness now believed to have been scarlet fever. Five years later, on the advice of Alexander Graham Bell, her parents applied to the Perkins Institute for the Blind in Boston for a teacher, and from that school hired Anne Mansfield Sullivan.