HDK

Special Characters

" " " quotation mark u+0022 ISOnum p:before { content:"\0022"; } alert("\42") & & & ampersand u+0026 ISOnum p:before { content:"\0026"; } alert("\46") < < less-than sign u+003C ISOnum p:before { content:"\003c"; } alert("\74"); > > > greater-than sign u+003E ISOnum p:before { content:"\003e"; } alert("\76");

#Latin-1 entity set for HTML

Name Numeric Description Hex ISO in CSS content Octal   no-break space %A0 p:before { content:"\00a0"; } alert("\240"); ¡ ? ¡ inverted exclamation mark %A1 p:before { content:"\00a1"; } alert("\241"); ¢ ￠ ¢ cent sign %A2 p:before { content:"\00a2"; } alert("\242"); £ ￡ £ pound sterling sign %A3 p:before { content:"\00a3"; } alert("\243"); ¤ ¤ ¤ general currency sign %A4 p:before { content:"\00a4"; } alert("\244"); ¥ ￥ ¥ yen sign %A5 p:before { content:"\00a5"; } alert("\245"); ¦ | ¦ broken (vertical) bar %A6 p:before { content:"\00a6"; } alert("\246"); § § § section sign %A7 p:before { content:"\00a7"; } alert("\247"); ¨ ¨ ¨ umlaut (dieresis) %A8 p:before { content:"\00a8"; } alert("\250"); © ? © copyright sign %A9 p:before { content:"\00a9"; } alert("\251"); ª a ª ordinal indicator, feminine %AA p:before { content:"\00aa"; } alert("\252"); « ? « angle quotation mark, left %AB p:before { content:"\00ab"; } alert("\253"); ¬ ? ¬ not sign %AC p:before { content:"\00ac"; } alert("\254"); ­ ­ soft hyphen %AD p:before { content:"\00ad"; } alert("\255"); ® ? ® registered sign %AE p:before { content:"\00ae"; } alert("\256"); ¯ ˉ ¯ macron %AF p:before { content:"\00af"; } alert("\257"); ° ° ° degree sign %B0 p:before { content:"\00b0"; } alert("\260"); ± ± ± plus-or-minus sign %B1 p:before { content:"\00b1"; } alert("\261"); ² 2 ² superscript two %B2 p:before { content:"\00b2"; } alert("\262"); ³ 3 ³ superscript three %B3 p:before { content:"\00b3"; } alert("\263"); ´ ′ ´ acute accent %B4 p:before { content:"\00b4"; } alert("\264"); µ μ µ micro sign %B5 p:before { content:"\00b5"; } alert("\265"); ¶ ? ¶ pilcrow (paragraph sign) %B6 p:before { content:"\00b6"; } alert("\266"); · · · middle dot %B7 p:before { content:"\00b7"; } alert("\267"); ¸ ? ¸ cedilla %B8 p:before { content:"\00b8"; } alert("\270"); ¹ 1 ¹ superscript one %B9 p:before { content:"\00b9"; } alert("\271"); º o º ordinal indicator, masculine %BA p:before { content:"\00ba"; } alert("\272"); » ? » angle quotation mark, right %BB p:before { content:"\00bb"; } alert("\273"); ¼ ? ¼ fraction one-quarter %BC p:before { content:"\00bc"; } alert("\274"); ½ ? ½ fraction one-half %BD p:before { content:"\00bd"; } alert("\275"); ¾ ? ¾ fraction three-quarters %BE p:before { content:"\00be"; } alert("\276"); ¿ ? ¿ inverted question mark %BF p:before { content:"\00bf"; } alert("\277"); À à À capital A, grave accent %C0 p:before { content:"\00c0"; } alert("\300"); Á á Á capital A, acute accent %C1 p:before { content:"\00c1"; } alert("\301"); Â ? Â capital A, circumflex accent %C2 p:before { content:"\00c2"; } alert("\302"); Ã ? Ã capital A, tilde %C3 p:before { content:"\00c3"; } alert("\303"); Ä ? Ä capital A, dieresis or umlaut mark %C4 p:before { content:"\00c4"; } alert("\304"); Å ? Å capital A, ring %C5 p:before { content:"\00c5"; } alert("\305"); Æ ? Æ capital AE diphthong (ligature) %C6 p:before { content:"\00c6"; } alert("\306"); Ç ? Ç capital C, cedilla %C7 p:before { content:"\00c7"; } alert("\307"); È è È capital E, grave accent %C8 p:before { content:"\00c8"; } alert("\310"); É é É capital E, acute accent %C9 p:before { content:"\00c9"; } alert("\311"); Ê ê Ê capital E, circumflex accent %CA p:before { content:"\00ca"; } alert("\312"); Ë ? Ë capital E, dieresis or umlaut mark %CB p:before { content:"\00cb"; } alert("\313"); Ì ì Ì capital I, grave accent %CC p:before { content:"\00cc"; } alert("\314"); Í í Í capital I, acute accent %CD p:before { content:"\00cd"; } alert("\315"); Î ? Î capital I, circumflex accent %CE p:before { content:"\00ce"; } alert("\316"); Ï ? Ï capital I, dieresis or umlaut mark %CF p:before { content:"\00cf"; } alert("\317"); Ð D Ð capital Eth, Icelandic %D0 p:before { content:"\00d0"; } alert("\320"); Ñ ? Ñ capital N, tilde %D1 p:before { content:"\00d1"; } alert("\321"); Ò ò Ò capital O, grave accent %D2 p:before { content:"\00d2"; } alert("\322"); Ó ó Ó capital O, acute accent %D3 p:before { content:"\00d3"; } alert("\323"); Ô ? Ô capital O, circumflex accent %D4 p:before { content:"\00d4"; } alert("\324"); Õ ? Õ capital O, tilde %D5 p:before { content:"\00d5"; } alert("\325"); Ö ? Ö capital O, dieresis or umlaut mark %D6 p:before { content:"\00d6"; } alert("\326"); × × × multiply sign %D7 p:before { content:"\00d7"; } alert("\327"); Ø ? Ø

capital O, slash

%D8 p:before { content:"\00d8"; } alert("\330"); Ù ù Ù capital U, grave accent %D9 p:before { content:"\00d9"; } alert("\331"); Ú ú Ú capital U, acute accent %DA p:before { content:"\00da"; } alert("\332"); Û ? Û capital U, circumflex accent %DB p:before { content:"\00db"; } alert("\333"); Ü ü Ü capital U, dieresis or umlaut mark %DC p:before { content:"\00dc"; } alert("\334"); Ý Y Ý capital Y, acute accent %DD p:before { content:"\00dd"; } alert("\335"); Þ T Þ capital THORN, Icelandic %DE p:before { content:"\00de"; } alert("\336"); ß ? ß small sharp s, German (sz ligature) %DF p:before { content:"\00df"; } alert("\337"); à à à small a, grave accent %E0 p:before { content:"\00e0"; } alert("\340"); á á á small a, acute accent %E1 p:before { content:"\00e1"; } alert("\341"); â a â small a, circumflex accent %E2 p:before { content:"\00e2"; } alert("\342"); ã ? ã small a, tilde %E3 p:before { content:"\00e3"; } alert("\343"); ä ? ä small a, dieresis or umlaut mark %E4 p:before { content:"\00e4"; } alert("\344"); å ? å small a, ring %E5 p:before { content:"\00e5"; } alert("\345"); æ ? æ small ae diphthong (ligature) %E6 p:before { content:"\00e6"; } alert("\346"); ç ? ç small c, cedilla %E7 p:before { content:"\00e7"; } alert("\347"); è è è small e, grave accent %E8 p:before { content:"\00e8"; } alert("\350"); é é é small e, acute accent %E9 p:before { content:"\00e9"; } alert("\351"); ê ê ê small e, circumflex accent %EA p:before { content:"\00ea"; } alert("\352"); ë ? ë small e, dieresis or umlaut mark %EB p:before { content:"\00eb"; } alert("\353"); ì ì ì small i, grave accent %EC p:before { content:"\00ec"; } alert("\354"); í í í small i, acute accent %ED p:before { content:"\00ed"; } alert("\355"); î ? î small i, circumflex accent %EE p:before { content:"\00ee"; } alert("\356"); ï ? ï small i, dieresis or umlaut mark %EF p:before { content:"\00ef"; } alert("\357"); ð e ð small eth, Icelandic %F0 p:before { content:"\00f0"; } alert("\360"); ñ ? ñ small n, tilde %F1 p:before { content:"\00f1"; } alert("\361"); ò ò ò small o, grave accent %F2 p:before { content:"\00f2"; } alert("\362"); ó ó ó small o, acute accent %F3 p:before { content:"\00f3"; } alert("\363"); ô ? ô small o, circumflex accent %F4 p:before { content:"\00f4"; } alert("\364"); õ ? õ small o, tilde %F5 p:before { content:"\00f5"; } alert("\365"); ö ? ö small o, dieresis or umlaut mark %F6 p:before { content:"\00f6"; } alert("\366"); ÷ ÷ ÷ divide sign %F7 p:before { content:"\00f7"; } alert("\367"); ø ? ø small o, slash %F8 p:before { content:"\00f8"; } alert("\370"); ù ù ù small u, grave accent %F9 p:before { content:"\00f9"; } alert("\371"); ú ú ú small u, acute accent %FA p:before { content:"\00fa"; } alert("\372"); û ? û small u, circumflex accent %FB p:before { content:"\00fb"; } alert("\373"); ü ü ü small u, dieresis or umlaut mark %FC p:before { content:"\00fc"; } alert("\374"); ý y ý small y, acute accent %FD p:before { content:"\00fd"; } alert("\375"); þ t þ small thorn, Icelandic %FE p:before { content:"\00fe"; } alert("\376"); ÿ ? ÿ small y, dieresis or umlaut mark %FF p:before { content:"\00ff"; } alert("\377");

#Latin Extended-A

Œ ? Œ latin capital ligature oe u+0152 ISOlat2 p:before { content:"\0152"; } alert("\u0152"); œ ? œ latin small ligature oe
(ligature is a misnomer, this is a separate character in some languages) u+0153 ISOlat2 p:before { content:"\0153"; } alert("\u0153"); Š ? Š latin capital letter s with caron u+0160 ISOlat2 p:before { content:"\0160"; } alert("\u0160"); š ? š latin small letter s with caron u+0161 ISOlat2 p:before { content:"\0161"; } alert("\u0161"); Ÿ ? Ÿ latin capital letter y with diaeresis u+0178 ISOlat2 p:before { content:"\0178"; } alert("\u0178");

#Latin Extended-B

ƒ ? ƒ latin small f with hook, a.k.a. function, a.k.a. florin u+0192 ISOtech p:before { content:"\0192"; } alert("\u0192");

#Spacing Modifier Letters

ˆ ? modifier letter circumflex accent u+02C6 ISOpub p:before { content:"\02c6"; } alert("\u02c6"); ˜ ? small tilde u+02DC ISOdia p:before { content:"\02dc"; } alert("\u02dc");

Greek

Α Α Α greek capital letter alpha u+0391 p:before { content:"\0391"; } alert("\u0391"); Β Β Β greek capital letter beta u+0392 p:before { content:"\0392"; } alert("\u0392"); Γ Γ Γ greek capital letter gamma u+0393 ISOgrk3 p:before { content:"\0393"; } alert("\u0395"); Δ Δ Δ greek capital letter delta u+0394 ISOgrk3 p:before { content:"\0394"; } alert("\u0394"); Ε Ε Ε greek capital letter epsilon u+0395 p:before { content:"\0395"; } alert("\u0395"); Ζ Ζ Ζ greek capital letter zeta u+0396 p:before { content:"\0396"; } alert("\u0396"); &Eta ; Η Η greek capital letter eta u+0397 p:before { content:"\0397"; } alert("\u0397"); Θ Θ Θ greek capital letter theta u+0398 ISOgrk3 p:before { content:"\0398"; } alert("\u0398"); Ι Ι Ι greek capital letter iota u+0399 p:before { content:"\0399"; } alert("\u0399"); Κ Κ Κ greek capital letter kappa u+039A p:before { content:"\039a"; } alert("\u039a"); Λ Λ Λ greek capital letter lambda u+039B ISOgrk3 p:before { content:"\039b"; } alert("\u039b"); &Mu ; Μ Μ greek capital letter mu u+039C p:before { content:"\039c"; } alert("\u039c"); &Nu ; Ν Ν greek capital letter nu u+039D p:before { content:"\039d"; } alert("\u039D"); &Xi ; Ξ Ξ greek capital letter xi u+039E ISOgrk3 p:before { content:"\039e"; } alert("\u039e"); Ο Ο Ο greek capital letter omicron u+039F p:before { content:"\039f"; } alert("\u039f"); &Pi ; Π Π greek capital letter pi u+03A0 ISOgrk3 p:before { content:"\03a0"; } alert("\u03a0"); &Rho ; Ρ Ρ greek capital letter rho u+03A1 p:before { content:"\03a1"; } alert("\u03a1"); there is no Sigmaf, and no u+03A2 character either) Σ Σ Σ greek capital letter sigma u+03A3 ISOgrk3 p:before { content:"\03a3"; } alert("\u03A3"); &Tau ; Τ Τ greek capital letter tau u+03A4 p:before { content:"\03a4"; } alert("\u03A4"); Υ Υ Υ greek capital letter upsilon u+03A5 ISOgrk3 p:before { content:"\03a5"; } alert("\u03A5"); &Phi ; Φ Φ greek capital letter phi u+03A6 ISOgrk3 p:before { content:"\03a6"; } alert("\u03A6"); &Chi ; Χ Χ greek capital letter chi u+03A7 p:before { content:"\03a7"; } alert("\u03A7"); &Psi ; Ψ Ψ greek capital letter psi u+03A8 ISOgrk3 p:before { content:"\03a8"; } alert("\u03A8"); Ω Ω Ω greek capital letter omega u+03A9 ISOgrk3 p:before { content:"\03a9"; } alert("\u03A9"); α α α greek small letter alpha u+03B1 ISOgrk3 p:before { content:"\03b1"; } alert("\u03b1"); β β β greek small letter beta u+03B2 ISOgrk3 p:before { content:"\03b2"; } alert("\u03b2"); γ γ γ greek small letter gamma u+03B3 ISOgrk3 p:before { content:"\03b3"; } alert("\u03b3"); δ δ δ greek small letter delta u+03B4 ISOgrk3 p:before { content:"\03b4"; } alert("\u03b4"); ε ε ε greek small letter epsilon u+03B5 ISOgrk3 p:before { content:"\03b5"; } alert("\u03b5"); ζ ζ ζ greek small letter zeta u+03B6 ISOgrk3 p:before { content:"\03b6"; } alert("\u03b6"); &eta ; η η greek small letter eta u+03B7 ISOgrk3 p:before { content:"\03b7"; } alert("\u03b7"); θ θ θ greek small letter theta u+03B8 ISOgrk3 p:before { content:"\03b8"; } alert("\u03b8"); ι ι ι greek small letter iota u+03B9 ISOgrk3 p:before { content:"\03b9"; } alert("\u03b9"); κ κ κ greek small letter kappa u+03BA ISOgrk3 p:before { content:"\03ba"; } alert("\u03ba"); λ λ λ greek small letter lambda u+03BB ISOgrk3 p:before { content:"\03bb"; } alert("\u03bb"); &mu ; μ μ greek small letter mu u+03BC ISOgrk3 p:before { content:"\03bc"; } alert("\u03bc"); &nu ; ν ν greek small letter nu u+03BD ISOgrk3 p:before { content:"\03bd"; } alert("\u03bd"); &xi ; ξ ξ greek small letter xi u+03BE ISOgrk3 p:before { content:"\03be"; } alert("\u03be"); ο ο ο greek small letter omicron u+03BF NEW p:before { content:"\03bf"; } alert("\u03bf"); &pi ; π π greek small letter pi u+03C0 ISOgrk3 p:before { content:"\03c0"; } alert("\u03c0"); &rho ; ρ ρ greek small letter rho u+03C1 ISOgrk3 p:before { content:"\03c1"; } alert("\u03c1"); ς ? ς greek small letter final sigma u+03C2 ISOgrk3 p:before { content:"\03C2"; } alert("\u03c2"); σ σ σ greek small letter sigma u+03C3 ISOgrk3 p:before { content:"\03C3"; } alert("\u03c3"); &tau ; τ τ greek small letter tau u+03C4 ISOgrk3 p:before { content:"\03C4"; } alert("\u03c4"); υ υ υ greek small letter upsilon u+03C5 ISOgrk3 p:before { content:"\03C5"; } alert("\u03c5"); &phi ; φ φ greek small letter phi u+03C6 ISOgrk3 p:before { content:"\03C6"; } alert("\03c6"); &chi ; χ χ greek small letter chi u+03C7 ISOgrk3 p:before { content:"\03C7"; } alert("\u03c7"); &psi ; ψ ψ greek small letter psi u+03C8 ISOgrk3 p:before { content:"\03C8"; } alert("\u03c8"); ω ω ω greek small letter omega u+03C9 ISOgrk3 p:before { content:"\03C9"; } alert("\u03c9"); ϑ ? ϑ greek small letter theta symbol u+03D1 NEW p:before { content:"\03D1"; } alert("\u03D1"); ϒ ? ϒ greek upsilon with hook symbol u+03D2 NEW p:before { content:"\03D2"; } alert("\u03D2"); &piv ; ? ϖ greek pi symbol u+03D6 ISOgrk3 p:before { content:"\03D6"; } alert("\u03D6");

Punctuation

  ?   en space u+2002 ISOpub p:before { content:"\2002";} alert("\u2002");   ?   em space u+2003 ISOpub p:before { content:"\2003";} alert("\u2003");   ?   thin space u+2009 ISOpub p:before { content:"\2009";} alert("\u2009"); ‌ ? ‌ zero width non-joiner u+200C NEW RFC 2070 p:before { content:"\200C";} alert("\u200C"); ‍ ? ‍ zero width joiner u+200D NEW RFC 2070 p:before { content:"\200D";} alert("\u200d"); ‎ ? ‎ left-to-right mark u+200E NEW RFC 2070 p:before { content:"\200E";} alert("\u200e"); ‏ ? ‏ right-to-left mark u+200F NEW RFC 2070 p:before { content:"\200F";} alert("\u200f"); – – – en dash u+2013 ISOpub p:before { content:"\2013";} alert("\u2013"); — — — em dash u+2014 ISOpub p:before { content:"\2014";} alert("\u2014"); ‘ ‘ ‘ left single quotation mark u+2018 ISOnum p:before { content:"\2018";} alert("\u2018"); ’ ’ ’ right single quotation mark u+2019 ISOnum p:before { content:"\2019";} alert("\u2019"); ‚ ? ‚ single low-9 quotation mark u+201A NEW p:before { content:"\201A";} alert("\u201a"); [ “ “ left double quotation mark u+201C ISOnum p:before { content:"\201C";} alert("\u201c"); ] ” ” right double quotation mark u+201D ISOnum p:before { content:"\201D";} alert("\u201d"); „ ? „ double low-9 quotation mark u+201E NEW p:before { content:"\201E";} alert("\u201e"); † ? † dagger u+2020 ISOpub p:before { content:"\2020";} alert("\u2020"); ‡ ? ‡ double dagger u+2021 ISOpub p:before { content:"\2021";} alert("\u2021"); ‰ ‰ ‰ per mille sign u+2030 ISOtech p:before { content:"\2030";} alert("\u2030"); ‹ ? ‹ single left-pointing angle quotation mark
(lsaquo is proposed but not yet ISO standardised) u+2039 ISO proposed p:before { content:"\2039";} alert("\u2039"); › ? › single right-pointing angle quotation mark
rsaquo is proposed but not yet ISO standardised u+203A ISO proposed p:before { content:"\203A";} alert("\u203a");

General Punctuation

• ? • bullet, a.k.a. black small circle
bullet is NOT the same as bullet operator — u+2219 u+2022 ISOpub alert("\u2219"); … … … horizontal ellipsis, a.k.a. three dot leader u+2026 ISOpub alert("\u2026"); ′ ′ ′ prime, a.k.a. minutes, a.k.a. feet u+2032 ISOtech alert("\u2032"); ″ ″ ″ double prime, a.k.a. seconds, a.k.a. inches u+2033 ISOtech alert("\u2033"); ‾ ￣ ‾ overline, a.k.a. spacing overscore u+203E NEW alert("\u203e"); ⁄ ? ⁄ fraction slash u+2044 NEW alert("\u8260");

Letterlike Symbols

℘ ? ℘ script capital P, a.k.a. power set, a.k.a. Weierstrass p u+2118 ISOamso alert("\u2118"); ℑ ? ℑ blackletter capital I, a.k.a. imaginary part u+2111 ISOamso alert("\u2111"); ℜ ? ℜ blackletter capital R, a.k.a. real part symbol u+211C ISOamso alert("\u211c"); ™ ? ™ trade mark sign u+2122 ISOnum alert("\u2122"); ℵ ? ℵ alef symbol, a.k.a. first transfinite cardinal
alef symbol is NOT the same as hebrew letter alef — u+05D0 although the same glyph
could be used to depict both characters u+2135 NEW alert("\u");

Arrows

← ← ← leftwards arrow u+2190 ISOnum alert("\u2190"); ↑ ↑ ↑ upwards arrow u+2191 ISOnum alert("\u2191"); → → → rightwards arrow u+2192 ISOnum alert("\u2192"); ↓ ↓ ↓ downwards arrow u+2193 ISOnum alert("\u2193"); ↔ ? ↔ left right arrow u+2194 ISOamsa alert("\u2194"); ↵ ? ↵ downwards arrow with corner leftwards, a.k.a. carriage return u+21B5 NEW alert("\u21b5"); ⇐ ? ⇐ leftwards double arrow
can be used for ‘is implied by’ u+21D0 ISOtech alert("\u21d0"); ⇑ ? ⇑ upwards double arrow u+21D1 ISOamsa alert("\u21d1"); ⇒ ? ⇒ rightwards double arrow u+21D2 ISOtech alert("\u21d2"); ⇓ ? ⇓ downwards double arrow u+21D3 ISOamsa alert("\ud1d3"); ⇔ ? ⇔ left right double arrow u+21D4 ISOamsa alert("\u21d4");

Mathematical Operators

∀ ? ∀ for all u+2200 ISOtech alert("\u2200"); ∂ ? ∂ partial differential u+2202 ISOtech alert("\u2202"); ∃ ? ∃ there exists u+2203 ISOtech alert("\u2203"); ∅ ? ∅ empty set, a.k.a. null set, a.k.a. diameter u+2205 ISOamso alert("\u2205"); ∇ ? ∇ nabla, a.k.a. backward difference u+2207 ISOtech alert("\u2207"); ∈ ∈ ∈ element of u+2208 ISOtech alert("\u2208"); ∉ ? ∉ not an element of u+2209 ISOtech alert("\u2209"); &ni ; ? ∋ contains as member u+220B ISOtech alert("\u220b"); ∏ ∏ ∏ n-ary product, a.k.a. product sign
prod is NOT the same character as u+03A0 ‘greek capital letter pi’ though the same
glyph might be used for both u+220F ISOamsb alert("\u03a0"); &sum ; ∑ ∑ n-ary sumation
sum is NOT the same character as u+03A3 ‘greek capital letter sigma’ though the same
glyph might be used for both u+2211 ISOamsb alert("\u03a3"); − ? − minus sign u+2212 ISOtech alert("\u2212"); ∗ ? ∗ asterisk operator u+2217 ISOtech alert("\u2217"); √ √ √ square root, a.k.a. radical sign u+221A ISOtech alert("\u221a"); ∝ ∝ ∝ proportional to u+221D ISOtech alert("\u221d"); ∞ ∞ ∞ infinity u+221E ISOtech alert("\u221e"); &ang ; ∠ ∠ angle u+2220 ISOamso alert("\u2220"); &and ; ⊥ ⊥ logical and, a.k.a. wedge u+2227 ISOtech alert("\u2227"); &or ; ? ⊦ logical or, a.k.a. vee u+2228 ISOtech alert("\u2228"); &cap ; ∩ ∩ intersection, a.k.a. cap u+2229 ISOtech alert("\u2229"); &cup ; ∪ ∪ union, a.k.a. cup u+222A ISOtech alert("\u222a"); &int ; ∫ ∫ integral u+222B ISOtech alert("\u222b"); ∴ ∴ ∴ therefore u+2234 ISOtech alert("\u2234"); &sim ; ～ ∼ tilde operator, a.k.a. varies with,
similar to tilde operator, but is NOT the same character as the tilde u+007E,
although the same glyph might be used to represent both u+223C ISOtech alert("\u223c"); ≅ ? ≅ approximately equal to u+2245 ISOtech alert("\u2245"); ≈ ≈ ≈ almost equal to, a.k.a. asymptotic to u+2248 ISOamsr alert("\u2248"); &ne ; ≠ ≠ not equal to u+2260 ISOtech alert("\u2260"); ≡ ≡ ≡ identical to u+2261 ISOtech alert("\u2261"); &le ; ≤ ≤ less-than or equal to u+2264 ISOtech alert("\u2264"); &ge ; ≥ ≥ greater-than or equal to u+2265 ISOtech alert("\u2265"); &sub ; ? ⊂ subset of u+2282 ISOtech alert("\u2282"); &sup ; ? ⊃ superset of
note that nsup, ‘not a superset of u+2283′ is not covered by the Symbol font
encoding and is not included. u+2283 ISOtech alert("\u2283"); ⊄ ? ⊄ not a subset of u+2284 ISOamsn alert("\u2284"); ⊆ ? ⊆ subset of or equal to u+2286 ISOtech alert("\u2286"); ⊇ ? ⊇ superset of or equal to u+2287 ISOtech alert("\u2287"); ⊕ ⊕ ⊕ circled plus, a.k.a. direct sum u+2295 ISOamsb alert("\u2295"); ⊗ ? ⊗ circled times, a.k.a. vector product u+2297 ISOamsb alert("\u2297"); ⊥ ⊥ ⊥ up tack, a.k.a. orthogonal to, a.k.a. perpendicular u+22A5 ISOtech alert("\u22a5"); ⋅ ? ⋅ dot operator
dot operator is NOT the same character as u+00B7 middle dot u+22C5 ISOamsb alert("\u22c5");

Miscellaneous Technical

⌈ ? ⌈ left ceiling, a.k.a. apl upstile u+2308, ISOamsc alert("\u2308"); ⌉ ? ⌉ right ceiling u+2309, ISOamsc alert("\u2309"); ⌊ ? ⌊ left floor, a.k.a. apl downstile u+230A, ISOamsc alert("\u230a"); ⌋ ? ⌋ right floor u+230B, ISOamsc alert("\u230b"); ⟨ 〈 〈 left-pointing angle bracket, a.k.a. bra
lang is NOT the same character as u+003C ‘less than’
or u+2039 ’single left-pointing angle quotation mark’ u+2329 ISOtech alert("\u2329"); ⟩ 〉 〉 right-pointing angle bracket, a.k.a. ket
rang is NOT the same character as u+003E ‘greater than’
or u+203A ’single right-pointing angle quotation mark’ u+232A ISOtech alert("\u232a");

Geometric Shapes

&loz ; ? ◊ lozenge u+25CA ISOpub alert("\u25ca");

Miscellaneous Symbols

♠ ? ♠ black spade suit u+2660 ISOpub alert("\u2660"); ♣ ? ♣ black club suit, a.k.a. shamrock u+2663 ISOpub alert("\u2663"); ♥ ? ♥ black heart suit, a.k.a. valentine u+2665 ISOpub alert("\u2665"); ♦ ? ♦ black diamond suit u+2666 ISOpub alert("\u2666");

参考文章：https://css-tricks测试数据/snippets/html/glyphs/

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