The book HTML Black Book by Steven Holzner (ISBN 1-57610-617-9, published in 2000) provides a chart of character entities for HTML 4.  A character entity allows special characters that may not appear on the keyboard to be displayed.  A character entity has one of these formats:

• &name; where name is the name of the entity.
• &#number where number is the number of the entity

Sym	Name	Number	Description
Á	Aacute	193	Latin capital letter A with acute
á	aacute	225	Latin small letter a with acute
Â	Acirc	194	Latin capital letter A with circumflex
â	acirc	226	Latin small letter a with circumflex
´	acute	180	Acute accent
Æ	AElig	198	Latin capital letter AE
æ	aelig	230	Latin small letter ae
À	Agrave	192	Latin capital letter A with grave
à	agrave	224	Latin small letter a with grave
ℵ	alefsym	8501	Alef symbol = first transfinite cardinal
Α	Alpha	913	Greek capital letter alpha
α	alpha	945	Greek small letter alpha
&	amp	38	Ampersand
∧	and	8743	Logical and
∠	ang	8736	Angle
Å	Aring	197	Latin capital letter A with ring above
å	aring	229	Latin small letter a with ring above
≈	asymp	8776	Almost equal to = asymptotic to
Ã	Atilde	195	Latin capital letter A with tilde
ã	atilde	227	Latin small letter a with tilde
Ä	Auml	196	Latin capital letter A with diaeresis (umlaut)
ä	auml	228	Latin small letter a with diaeresis (umlaut)
„	bdquo	8222	Double low-9 quotation
Β	Beta	914	Greek capital letter beta
β	beta	946	Greek small letter beta
¦	brvbar	166	Broken bar = broken vertical bar
•	bull	8226	Bullet = black small circle
∩	cap	8745	Intersection = cap
Ç	Ccedil	199	Latin capital letter C with cedilla
ç	ccedil	231	Latin small letter c with cedilla
¸	cedil	184	Cedilla
¢	cent	162	Cent sign
Χ	Chi	935	Greek capital letter chi
χ	chi	967	Greek small letter chi
ˆ	circ	710	Modifier letter circumflex accent
♣	clubs	9827	Black club suit = shamrock
≅	cong	8773	Approximately equal to
©	copy	169	Copyright sign
↵	crarr	8629	Downwards arrow with corner leftwards
∪	cup	8746	Union = cup
¤	curren	164	Currency sign
‡	Dagger	8225	Double dagger
†	dagger	8224	Dagger
⇓	dArr	8659	Downwards double arrow
↓	darr	8595	Downwards arrow
°	deg	176	Degree sign
Δ	Delta	916	Greek capital letter delta
δ	delta	948	Greek small letter delta
♦	diams	9830	Black diamond suit
÷	divide	247	Division sign
É	Eacute	201	Latin capital letter E with acute
é	eacute	233	Latin small letter e with acute
Ê	Ecirc	202	Latin capital letter E with circumflex
ê	ecirc	234	Latin small letter e with circumflex
È	Egrave	200	Latin capital letter E with grave
è	egrave	232	Latin small letter e with grave
∅	empty	8709	Empty set = null set = diameter
	emsp	8195	Em space
	ensp	8194	En space
Ε	Epsilon	917	Greek capital letter epsilon
ε	epsilon	949	Greek small letter epsilon
≡	equiv	8801	Identical to
Η	Eta	919	Greek capital letter eta
η	eta	951	Greek small letter eta
Ð	ETH	208	Greek capital letter ETH
ð	eth	240	Greek capital letter eth
Ë	Euml	203	Latin capital letter E with diaeresis (umlaut)
ë	euml	235	Latin small letter e with diaeresis (umlaut)
€	euro	8364	Euro sign
∃	exist	8707	There exists
ƒ	fnof	402	Latin small f with hook = function
∀	forall	8704	For all
½	frac12	189	Vulgar fraction one half
¼	frac14	188	Vulgar fraction one quarter
¾	frac34	190	Vulgar fraction three quarters
⁄	frasl	189	Fraction slash
Γ	Gamma	915	Greek capital letter gamma
γ	gamma	947	Greek small letter gamma
≥	ge	8805	Greater-than or equal to
>	gt	62	Greater-than sign
⇔	hArr	8660	Left right double arrow
↔	harr	8596	Left right arrow
♥	hearts	9829	Black heart suit = valentine
…	hellip	8230	Horizontal ellipsis = three dot leader
Í	Iacute	205	Latin capital letter I with acute
í	iacute	237	Latin small letter i with acute
Î	Icirc	206	Latin capital letter I with circumflex
î	icirc	238	Latin small letter i with circumflex
¡	iexcl	161	Inverted exclamation mark
Ì	Igrave	204	Latin capital letter I with grave
ì	igrave	236	Latin small letter i with grave
ℑ	image	8465	Blackletter capital I = imaginary part
∞	infin	8734	Infinity
∫	int	8747	Integral
Ι	Iota	921	Greek capital letter iota
ι	iota	953	Greek small letter iota
¿	iquest	191	Inverted question mark
∈	isin	8712	Element of
Ï	Iuml	207	Latin capital letter I with diaeresis (umlaut)
ï	iuml	239	Latin small letter i with diaeresis (umlaut)
Κ	Kappa	922	Greek capital letter kappa
κ	kappa	954	Greek small letter kappa
Λ	Lambda	923	Greek capital letter lambda
λ	lambda	955	Greek small letter lambda
⟨	lang	9001	Left-pointing angle bracket = bra
«	laquo	171	Left-pointing double angle quotation mark
⇐	lArr	8656	Leftwards double arrow
←	larr	8592	Leftwards arrow
⌈	lceil	8968	Left ceiling = apl upstile
“	ldquo	8220	Left double quotation mark
≤	le	8804	Less-than or equal to
⌊	lfloor	8970	Left floor = apl downstile
∗	lowast	8727	Asterisk operator
◊	loz	9674	Lozenge
‎‎	lrm	8206	Left-to-right mark
‹	lsaquo	8249	Single left-pointing angle quotation mark
‘	lsquo	8216	Left single quotation mark
<	lt	60	Less-than sign
¯	macr	175	Macron = spacing macron
—	mdash	8212	Em dash
µ	micro	181	Micro sign
·	middot	183	Middle dot
−	minus	8722	Minus sign
Μ	Mu	924	Greek capital letter mu
μ	mu	956	Greek small letter mu
∇	nabla	8711	Nabla = backward difference
	nbsp	160	No-break space = nonbreaking space
–	ndash	8211	En dash
≠	ne	8800	Not equal to
∋	ni	8715	Contains as member
¬	not	172	Not sign
∉	notin	8713	Not an element of
⊄	nsub	8836	Not a subset of
Ñ	Ntilde	209	Latin capital letter N with tilde
ñ	ntilde	241	Latin small letter n with tilde
Ν	Nu	925	Greek capital letter nu
ν	nu	957	Greek small letter nu
Ó	Oacute	211	Latin capital letter O with acute
ó	oacute	243	Latin small letter o with acute
Ô	Ocirc	212	Latin capital letter O with circumflex
ô	ocirc	244	Latin small letter o with circumflex
Œ	OElig	338	Latin capital ligature OE
œ	oelig	339	Latin small ligature oe
Ò	Ograve	210	Latin capital letter O with grave
ò	ograve	242	Latin small letter o with grave
‾	oline	8254	Overline = spacing overscore
Ω	Omega	937	Greek capital letter omega
ω	omega	969	Greek small letter omega
Ο	Omicron	927	Greek capital letter omicron
ο	omicron	959	Greek small letter omicron
⊕	oplus	8853	Circled plus = direct sum
∨	or	8744	Logical or = vee
ª	ordf	170	Feminine ordinal indicator
º	ordm	186	Masculine ordinal indicator
Ø	Oslash	216	Latin capital letter O with stroke
ø	oslash	248	Latin small letter o with stroke
Õ	Otilde	213	Latin capital letter O with tilde
õ	otilde	245	Latin small letter o with tilde
⊗	otimes	8855	Circled times = vector product
Ö	Ouml	214	Latin capital letter O with diaeresis (umlaut)
ö	ouml	246	Latin small letter o with diaeresis (umlaut)
¶	para	182	Pilcrow sign
∂	part	8706	Partial differential
‰	permil	8240	Per mille sign
⊥	perp	8869	Up tack = orthogonal to = perpendicular
Φ	Phi	934	Greek capital letter phi
φ	phi	966	Greek small letter phi
Π	Pi	928	Greek capital letter pi
π	pi	960	Greek small letter pi
ϖ	piv	982	Greek pi symbol
±	plusmn	177	Plus-minus sign
£	pound	163	Pound sign
″	Prime	8243	Double prime = seconds = inches
′	prime	8242	Prime = mintes = feet
∏	prod	8719	N-ary product = product sign
∝	prop	8733	Proportional to
Ψ	Psi	936	Greek capital letter psi
ψ	psi	968	Greek small letter psi
"	quot	34	Quotation mark = APL quote
√	radic	8730	Square root = radical sign
⟩	rang	9002	Right-pointing angle bracket = ket
»	raquo	187	Right-pointing double angle quotation mark
⇒	rArr	8658	Rightwards double arrow
→	rarr	8594	Rightwards arrow
⌉	rceil	8969	right ceiling
”	rdquo	8221	Right double quotation mark
ℜ	real	8476	Blackletter capital R = real part symbol
®	reg	174	Registered sign
⌋	rfloor	8971	Right floor
Ρ	Rho	929	Greek capital letter rho
ρ	rho	961	Greek small letter rho
‏‏	rlm	8207	Right-to-left mark
›	rsaquo	8250	Single right-pointing angle quotation mark
’	rsquo	8217	Right single quotation mark
‚	sbquo	8218	Single low-9 quotation mark
Š	Scaron	352	Latin capital letter S with caron
š	scaron	353	Latin small letter s with caron
⋅	sdot	8901	Dot operator
§	sect	167	Section sign
­	shy	173	Soft hyphen
Σ	Sigma	931	Greek capital letter sigma
σ	sigma	963	Greek small letter sigma
ς	sigmaf	962	Greek small letter final sigma
∼	sim	8764	Tilde operator
♠	spades	9824	Black spades suit
⊂	sub	8834	Subset of
⊆	sube	8838	Subset of or equal to
∑	sum	8721	N-ary sumation
⊃	sup	8835	Superset of
¹	sup1	185	Superscript one
²	sup2	178	Superscript two
³	sup3	179	Superscript three
⊇	supe	8839	Superset of or equal to
ß	szlig	223	Latin small letter sharp s
Τ	Tau	932	Greek capital letter tau
τ	tau	964	Greek small letter tau
∴	there4	8756	Therefore
Θ	Theta	920	Greek capital letter theta
θ	theta	952	Greek small letter theta
ϑ	thetasym	977	Greek small letter theta symbol
	thinsp	8201	Thin space
Þ	THORN	222	Latin capital letter THORN
þ	thorn	254	Latin small letter thorn
˜	tilde	732	Small tilde
×	times	215	Multiplication sign
™	trade	8482	Trade mark sign
Ú	Uacute	218	Latin capital letter U with acute
ú	uacute	250	Latin small letter u with acute
⇑	uArr	8657	Upwards double arrow
↑	uarr	8593	Upwards arrow
Û	Ucirc	219	Latin capital letter U with circumflex
û	ucirc	251	Latin small letter u with circumflex
Ù	Ugrave	217	Latin capital letter U with grave
ù	ugrave	249	Latin small letter u with grave
¨	uml	168	Diaeresis (umlaut)
ϒ	upsih	978	Greek upsilon with hook symbol
Υ	Upsilon	933	Greek capital letter upsilon
υ	upsilon	965	Greek small letter upsilon
Ü	Uuml	220	Latin capital letter U with diaeresis (umlaut)
ü	uuml	252	Latin small letter u with diaeresis (umlaut)
℘	weierp	8472	Script capital P = power set
Ξ	Xi	926	Greek capital letter xi
ξ	xi	958	Greek small letter xi
Ý	Yacute	220	Latin capital letter Y with acute
ý	yacute	253	Latin small letter y with acute
¥	yen	165	Yen sign = yuan sign
Ÿ	Yuml	376	Latin capital letter Y with diaeresis (umlaut)
ÿ	yuml	255	Latin small letter y with diaeresis (umlaut)
Ζ	Zeta	918	Greek capital letter zeta
ζ	zeta	950	Greek small letter zeta
‍‍	zwj	8205	Zero width joiner
‌‌	zwnj	8204	Zero width nonjoiner