POWER OF ATTORNEY


     The  undersigned  Donald R. Sweitzer  hereby  designates,  constitutes  and
appoints each of William B. Danzell,  Nigel P. Hebborn and Benjamin M. Alexander
singly,  my true and lawful  attorney and authorizes each of them singly to sign
for  me and  in my  name  any  Initial  Statement  of  Beneficial  Ownership  of
Securities on Form 3, Statement of Changes in Beneficial Ownership on Form 4, or
Annual  Statement  of  Changes in  Beneficial  Ownership  on Form 5 relating  to
Nestor, Inc., such power and authority to remain in force until June 30, 2007.


     IN  WITNESS  WHEREOF,  the  undersigned  has duly  executed  this  Power of
Attorney as a sealed instrument this 8th day of July 2004.



                                                     /s/Donald R. Sweitzer
                                                     --------------------------
                                                     Donald R. Sweitzer