How to make the index appear with letters (A, B, C, ...)

[Munzir Taha]

When I make an index, the letters which categorize each group don't appear 
automatically, How can I make them show? I passed quicly over makeindex.dvi 
and ind.dvi but couldn't figure it out. Sorry!
TIA
-- 
Munzir Taha,
Telecommunications and Electronics Engineer,
Certified Internet Webmaster, (CIW),
Microsoft Office User Specialist, (MOUS),
New Horizons Computer Learning Centers,
Riyadh, Saudi Arabia