381800900000 under HS Code CHEMICAL ELEMENTS DOPED FOR USE IN ELECTRONICS, IN THE FORM OF DISCS, WAFERS OR SIMILAR FORMS; CHEMICAL COMPOUNDS DOPED FOR USE IN ELECTRONICS CHEMICAL ELEMENTS DOPED FOR USE IN ELECTRONICS, IN THE FORM OF DISCS, WAFERS OR SIMILAR FORMS; CHEMICAL COMPOUNDS DOPED FOR USE IN ELECTRONICS: OTHER, 848690000000 under HS Code MACHINES AND APPARUTUS OF A KIND USED SOLELY OR PRINCIPALLY FOR THE MANUFACTURE OF SEMI CONDUCTOR BOULES OR WAFERS,SEMI CONDUCTOR DEVICES,ELECTRONIC INTEGRATED CIRCUITS OR FLAT PANEL DISPLAYS; MACHINES AND APPARUTUS SPECIFIED IN NOTE 9(C) TO THIS CHAPTER ; PARTS AND ACCESSORIES - PARTS AND ACCESSORIES, and 900290009900 under HS Code LENSES, PRISMS, MIRRORS AND OTHER OPTICAL ELEMENTS, OF ANY MATERIAL, MOUNTED, BEING PARTS OF OR FITTINGS FOR INSTRUMENTS OR APPARATUS, OTHER THAN SUCH ELEMENTS OF GLASS NOT OPTICALLY WORKED OTHER were the top imported HS Codes by A.İ.B.Ü. REKTÖRLÜK BİLİMSEL ARAŞTIRMA PROJELERİ KOORDİNATÖRLÜĞÜ in 2021.