Tajik are some of the languages spoken. Mountains cover more than 90% of the country. It is a developing country with a transitional economy that is highly dependent on remittances, aluminium and cotton production. Tajikistan is a member of the United Nations, CIS, OSCE, OIC, ECO, SCO, and CSTO as well as a NATO PfP partner. Etymology The term "Tajik" itself ultimately derives from the Middle Persian "Tāzīk", the Turkic rendition of the Arabic ethnonym Ṭayyi’, denoting a large Qahtanite Arab tribe who emigrated to Transoxiana region of Central Asia in the 7th century AD. Tajikistan appeared as Tadjikistan or Tadzhikistan in English prior to 1991. This is due to a transliteration from the . In Russian, there is no single letter "j" to represent the phoneme , and therefore , or dzh, is used. Tadzhikistan is the most common alternate spelling and is widely used in English literature derived from Russian sources. "Tadjikistan" is the spelling in French and can occasionally be found in English language texts. The way of writing Tajikistan in the Perso-Arabic script is: . Even though the Library of Congress's 1997 Country Study of Tajikistan found it difficult to definitively state the origins of the word "Tajik" because the term is "embroiled in twentieth-century political disputes about whether Turkic or Iranian peoples were the original inhabitants of Central Asia," most scholars concluded that contemporary Tajiks are the descendants of the ancient Eastern Iranian inhabitants of Central Asia, in particular, the Sogdians and the Bactrians, and possibly other groups, with an admixture of Western Iranian Persians and non-Iranian peoples. According to Richard Nelson Frye, a leading historian of Iranian and Central Asian history, the Persian emigration to Central Asia may be considered the beginning of the modern Tajik nation, and ethnic Persians, along with some elements of the Eastern Iranian Bactrians and Sogdians, as the main ancestors of the modern Tajiks. In later works, Frye expands on the complexity of the historical origins of the Tajiks. In a 1996 publication, Frye explains that many "factors must be taken into account in explaining the evolution of the peoples whose remnants are the Tajiks in Central Asia" and that "the peoples of Central Asia, whether Iranian or Turkic speaking, have one culture, one religion, one set of social values and traditions with only language separating them." Regarding Tajiks, the Encyclopædia Britannica states: History Early history Cultures in the