STRUCTURAL TRANSFER IN AN ENGLISH TO TURKISH MACHINE TRANSLATION SYSTEM Cigdem Keyder Turhan In the present thesis, the design and implementation of the transfer component of a transfer-based, human-assisted English to Turkish machine translation system using structural mapping has been discussed. The main objective of the system is to produce high-quality, low-cost, timely translations in technical domains. The source language intermediate representation utilized stores the feature structures and grammatical functions of the input sentence in a language independent formalism allowing the system to extend to other source languages. The important issues dealing with the differences between the languages are reflected on the transfer module in the form of complex transfer rules. The performance of the system has been evaluated according to the system's behaviour and linguistic coverage.