Im following a British curriculum for high schools ( known as A levels ) . Im reading stuff from this forum and i come across differences in notation used by the British and the Americans ..... plus differences in units ..... why is this so ???? why couldnt u guys settle on one universal system of units , notations etc .... wouldnt it have been much better if u could follow one system ???? some follow the American way and some the English ...... plus I dont know if americans follow SI or not , but the british certainly dont follow it all the time .