A S ANY LANGUAGE IN THE WORLD A SIGN LANGUAGE HAS MANY ADVANTAGES. F IRST OF ALL, IT IS QUITE RICH TO SHOW THE MOST IMPORTANT MEANINGS THAT EXIST IN ALL LANGUAGES. A S A RESULT, A SIGN LANGUAGE CAN BE USED TO DISCUSS ANY TOPIC, FROM VERY SIMPLE TO DIFFICULT. A LSO, IT IS MORE SYSTEMATIC THAN SPOKEN LANGUAGES. A DDITIONALLY, THE VISUAL FORM OF SIGN LANGUAGE MAKES A CONNECTION BETWEEN FORM AND MEANING. A SIGN LANGUAGE ALSO HAS SOME DISADVANTAGES. F IRSTLY, IT IS VERY COMPLEX, SO IT TAKES MUCH TIME TO LEARN THE LANGUAGE. S ECONDLY, IT CAN BE EASILY MISUNDERSTOOD IN OTHER COUNTRIES BECAUSE EACH SIGN LANGUAGE HAS SIMILARITIES BUT AT THE SAME TIME ONE SIGN HAS DIFFERENT MEANING IN OTHER CULTURES. T HIRDLY, IT CAN NOT BE TOTALLY USED IN THE DARKNESS BECAUSE IT IS A VISUALLY BASED TYPE OF COMMUNICATION. A ND FOURTHLY, A SIGN LANGUAGE CAN NOT BE USED BY PEOPLE WHO ARE PHYSICALLY DISABLED OR DO NOT HAVE SOME PARTS OF THEIR BODY.