Most special characters will render okay on most browsers. A few may not display a few properly. More at http://www.htmlhelp.com/reference/html40/entities/

super- and sub-scripts

enclose characters between  for superscript ( for subscript) and  for superscript ( for subscript); e.g., for Ca++, type Ca++

dagger

† - type †

double dagger

‡ - type ‡

degree

° - type °

1/2

½ - type ½

1/4

¼ - type ¼

alpha

α - type α

beta

β - type β

gamma

γ - type γ

micro

µ - type µ

greater than

> - type >

less than

< - type &lt;