“…(1988), Sami (1990), Zornetzer et al (1990), Antognetti and Milutinovic (1991), Ramacher and Rückert (1991), Sanchez-Sinencio and Lau (1992), Hassoun (1993), Przytula and Prasama (1993), Delgado-Frias and Moore (1994) and Glesner and Pöchmüller (1994) together with the references therein. Several overview articles or chapters can also be recommended: , Mackie et al (1988), Jackel et al (1987), Jackel (1991), Przytula (1988), DARPA (1989), Del Corso et al (1989), Denker (1986), Goser et al (1989), Personnaz and Dreyfus (1989), Treleaven (1989), Treleaven et al (1989), Schwartz (1990), Burr (1991Burr ( , 1992, Nordström and Svensson (1991), Graf et al (1991Graf et al ( -having many references, 1993, Hirai (1991), Holler (1991), Ienne (1993a, b), Lindsey and Lindblad (1994) and the recent ones-Heemskerk (1995), Hammerstrom (1995) and Morgan (1995). Digital integrated circuit implementations One of the difficult problems when discussing dedicated architectures for artificial neural networks is how to classify them.…”