Electronics/Symbols

Switches
See here for more examples:

Greek characters
One reason people don't understand math or Physics very well is that it literally is Greek to them.


 * alpha &alpha;
 * beta &beta;
 * gamma &gamma;
 * delta &delta;
 * epsilon &epsilon;
 * zeta &zeta;
 * eta &eta;
 * theta &theta;
 * iota &iota;
 * kappa &kappa;
 * lambda &lambda;
 * mu &mu;
 * nu &nu;
 * xi &xi;
 * pi &pi;
 * piv &piv;
 * rho &rho;
 * sigma &sigma;
 * sigmaf &sigmaf;
 * tau &tau;
 * upsilon &upsilon;
 * phi &phi;
 * chi &chi;
 * psi &psi;
 * omega &omega;
 * Gamma &Gamma;
 * Delta &Delta;
 * Theta &Theta;
 * Lambda &Lambda;
 * Xi &Xi;
 * Pi &Pi;
 * Sigma &Sigma;
 * Upsilon &Upsilon;
 * Phi &Phi;
 * Psi &Psi;
 * Omega &Omega;