How can I delete the or3 and & notations from this and gate?

Question

\documentclass{exam}  
\usepackage{pst-circ}  
\usepackage{multicol}  
\begin{document}  
\begin{pspicture}(-1,-1)(5,4)  
\logic[logicWidth=2,unit=0.5,logicHeight=4,logicNInput=3](-2,-2){or3}  
\end{pspicture}   
\end{document}

Answer 1

The version pf pst-circ.tex from http://texnik.dante.de/tex/generic/pst-circ/ knows the optional arguments logicLabelstyle and logicSymbolstyle. You can set these parameters to an empty argument:

\documentclass{exam}  
\usepackage{pst-circ}  
\begin{document}  

\begin{pspicture}(-1,-1)(5,4)  
\logic[logicWidth=1,logicHeight=2,logicNInput=3,
  logicSymbolstyle=,logicLabelstyle=](-2,-2){or3}  
\end{pspicture}   

\end{document}