Arabic language interests millions of non-Arab Muslims, who do not speak it as a native language, to learn it to different levels, mainly because it is the language of their holy book, the Quran, and all Islamic terms are Arabic. Arabic has been taught in many elementary and secondary schools, especially Muslim schools, worldwide. Many universities in the world today have classes for studying Arabic as a foreign language, as part of their foreign languages, Middle Eastern studies, religious studies, area studies departments, and even stand-alone Arabic language departments. Many Arabic language schools exist today to assist students in gaining Arabic language skills outside academic education. Most of the Arabic language schools are located in the Arab world and some Muslim world countries. Software and books with tapes are also important part of Arabic learning, as many of Arabic learners may live in places where there are no academic or Arabic language school classes available. Radio series of Arabic language classes are also provided from some radio stations. A number of websites on the Internet provide online classes for all levels as a means of distance education.