Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2008.1841.1849ZiabariMirmansourKassaiAhmad MohadesMaklavaniShahin EnayatiZiabariAmirkoushyar102008810In this study, first we described the different proposed design of QCAs and their functions. Then we described cell to cell interaction in the presence of external clocking voltage and finally we designed a 4-bit computer using a 4-bit processor which can be used as an 8-bit computer. This design study is based on this specification of 4-bit accumulator so that 8-bit data can be parallel processed in even and odd clock cycles. Our aim is to provide some evidences that quantum dot computers have the potential of increasing their word length and data capacity.]]>Cho, H. and E.E. Swartzlander, 2000Cho, H. and E.E. Swartzlander,2007Kim, K., K. Wu and R. Karri,2006Lent, C.S. and P.D. Tougaw,1997Lent, C.S. and B. Isaksen, 2003Lu, Y., M. Liu and C.S. Lent, 2006Orlov, A.O., R. Kummamuru, R. Ramasubramaniam, C.S. Lent, G.H. Bernstein and G.L. Snider, 2003Sayeeda, S., S. Al Imam and K. Radecka, 2006Snider, G.L., A.O. Orlev, R.K. Kummamuru, R. Ramasubramaniam and I. Amlani et al.,2001Timler, J. and C.S. Lent, 2003Walus, K., M. Mazur, G. Schulhof and G.A. Jullien, 2005Wei, W., K. Walus and G.A. Jullien, 2003