Alt Codes and HTML Symbol Codes

The Alt Codes
Hold down your "ALT" key while you type in the numbers using the the keypad on the right side of your keyboard. Use these and amaze your friends!
0124	\|	0131	ƒ	0132	„	0133	…
0134	†	0135	‡	0136	ˆ	0137	‰
0138	Š	0139	‹	0140	Œ	0145	‘
0146	’	0147	“	0148	”	0149	•
0150	–	0151	—	0152	˜	0153	™
0154	š	0155	›	0156	œ	0159	Ÿ
0161	¡	0162	¢	0163	£	0164	¤
0165	¥	0166	¦	0167	§	0168	¨
0169	©	0170	ª	0171	«	0172	¬
0174	®	0175	¯	0176	°	0177	±
0178	²	0179	³	0180	´	0181	µ
0182	¶	0183	·	0184	¸	0185	º
0187	»	0188	¼	0189	½	0190	¾
0191	¿	0192	À	0193	Á	0194	Â
0195	Ã	0196	Ä	0197	Å	0198	Æ
0199	Ç	0200	È	0201	É	0202	Ê
0203	Ë	0204	Ì	0205	Í	0206	Î
0207	Ï	0208	Ð	0209	Ñ	0210	Ò
0211	Ó	0212	Ô	0213	Õ	0214	Ö
0215	×	0216	Ø	0217	Ù	0218	Ú
0219	Û	0220	Ü	0221	Ý	0222	Þ
0223	ß	0224	à	0225	á	0226	â
0227	ã	0228	ä	0229	å	0230	æ
0231	ç	0232	è	0233	é	0234	ê
0235	ë	0236	ì	0237	í	0238	î
0239	ï	0240	ð	0241	ñ	0242	ò
0243	ó	0244	ô	0245	õ	0246	ö
0248	ø	0249	ù	0250	ú	0251	û
0252	ü	0253	ý	0254	þ	0255	ÿ

The following sets of codes can be used by webmasters in their HTML to make the symbols shown. Unfortunately, the ALT option doesn't work for these.

The Greek Character Sets
Each code given needs to be preceded by a "&#" to make the symbol
913;	Α	914;	Β	915;	Γ	916;	Δ
917;	Ε	918;	Ζ	919;	Η	920;	Θ
921;	Ι	922;	Κ	923;	Λ	924;	Μ
925;	Ν	926;	Ξ	927;	Ο	928;	Π
929;	Ρ	931;	Σ	932;	Τ	933;	Υ
934;	Φ	935;	Χ	936;	Ψ	937;	Ω

Each code given needs to be preceded by a "&#" to make the symbol
945;	α	946;	β	947;	γ	948;	δ
949;	ε	950;	ζ	951;	η	952;	θ
953;	ι	954;	κ	955;	λ	956;	μ
957;	ν	958;	ξ	959;	ο	960;	π
961;	ρ	963;	σ	964;	τ	965;	υ
966;	φ	967;	χ	968;	ψ	969;	ω

Arrow Characters
Each code given needs to be preceded by a "&#" to make the symbol
8592;	←	8593;	↑	8594;	→	8595;	↓
8596;	↔	8597;	↕	8658;	⇒	8660;	⇔

Math Characters
Each code given needs to be preceded by a "&#" to make the symbol
8704;	∀	For All	8706;	∂	Partial Differential
8707;	∃	There Exists	8711;	∇	Nabla
8712;	∈	Element of	8715;	∋	Contains a Member
8719;	∏	N-ary Product	8721;	∑	N-ary Summation
8730;	√	Square Root	8733;	∝	Proportional To
8734;	∞	Infinity	8736;	∠	Angle
8741;	∥	Parallel	8742;	∦	A Box :^)
8743;	∧	Logical And	8744;	∨	Logical or
8745;	∩	Intersection	8746;	∪	Union
8747;	∫	Integral	8748;	∬	Double Integral
8750;	∮	?	8756;	∴	Therefore
8757;	∵	?	8765;	∽	?
8776;	≈	Almost Equal To	8786;	≒	?
8800;	≠	Not Equal To	8801;	≡	Identical To
8804;	≤	Less Than or Equal To	8805;	≥	Greater Than or Equal To
8806;	≦	?	8807;	≧	?
8810;	≪	?	8811;	≫	?
8834;	⊂	Subset of	8835;	⊃	Superset of
8838;	⊆	Subset of or Equal to	8839;	⊇	Superset of or Equal to
8869;	⊥	Perpendicular	8895;	⊿	Right Angle

Card Suits
Each code given needs to be preceded by a "&#" to make the symbol
9824;	♠	Spades Suit	9827;	♣	Clubs Suit
9829;	♥	Hearts Suit	9830;	♦	Diamonds Suit

Please be aware that not all symbols are included in all font sets. There are a couple variables that determine whether or not you see the appropriate symbol.
1. The font must be installed on your computer.
2. The symbol must be contained in that particular font set.
I used times new roman and tahoma here, so I think I got about all of them.