The main purpose of this paper is to identify factors and conditions that are important for successful implementation of computers in Iranian schools during one decade from 1995 to 2005. The second focus of this paper is to examine how these factors relate to models of implementation in other countries such as developed countries. This paper is written based on the results of three studies which had been done in 1995, 2000 and 2005. Participants were samples of different groups involved in the implementation process during these years. The data collected consisted of questionnaires, semi-structured interviews, policy documents. The results indicate that some factors were reported very important during one decade such as the role of situational factors such as traditional societies in transition. The most important factors of traditional societies in transition were included: socio-economic, socio-cultural factors and political stability. (Contains 5 tables and 1 figure.)