| Π| 338 | OElig | Latin capital ligature OE | |
| œ | 339 | oelig | Latin small ligature oe | |
| Ò | 210 | Ograve | Latin capital letter O with grave accent |
| ò | 242 | ograve | Latin small letter o with grave accent | |
| ‾ | 8254 | oline | Overline = spacing overscore | |
| Ω | 937 | Omega | Greek capital letter omega |
| ω | 969 | omega | Greek small letter omega | |
| Ο | 927 | Omicron | Greek capital letter omicron | |
| ο | 959 | omicron | Greek small letter omicron |
| ⊕ | 8853 | oplus | Circled plus = direct sum | IE? |
| ∨ | 8744 | or | Logical or = vee | No IE |
| ª | 170 | ordf | Feminine ordinal indicator |
| º | 186 | ordm | Masculine ordinal indicator | |
| Ø | 216 | Oslash | Latin capital letter O with stroke | |
| ø | 248 | oslash | Latin small letter o with stroke |
| Õ | 213 | Otilde | Latin capital letter O with tilde | |
| õ | 245 | otilde | Latin small letter o with tilde | |
| ⊗ | 8855 | otimes | Circled times = vector product | No IE |
| Ö | 214 | Ouml | Latin capital letter O with diaeresis (umlaut) | |
| ö | 246 | ouml | Latin small letter o with diaeresis (umlaut) | |
| ¶ | 182 | para | Pilcrow sign |
| ∂ | 8706 | part | Partial differential | |
| ‰ | 8240 | permil | Per mile sign | |
| ⊥ | 8869 | perp | Up tack = orthogonal to = perpendicular | No IE |
| Φ | 934 | Phi | Greek capital letter phi | |
| φ | 966 | phi | Greek small letter phi | |
| Π | 928 | Pi | Greek capital letter pi |
| π | 960 | pi | Greek small letter pi | |
| ϖ | 982 | piv | Greek pi symbol | No IE |
| ± | 177 | plusmn | Plus-minus sign |
| £ | 163 | pound | Pound sign | |
| ′ | 8242 | prime | Prime = minutes = feet | |
| ″ | 8243 | Prime | Double prime = seconds = inches |
| ∏ | 8719 | prod | N-ary product = product sign | IE? |
| ∝ | 8733 | prop | Proportional to | No IE |
| Ψ | 936 | Psi | Greek capital letter psi |
| ψ | 968 | psi | Greek small letter psi | |
| " | 34 | quot | Quotation mark = APL quote | |
| √ | 8730 | radic | Square root = radical sign |
| 〉 | 9002 | rang | Right-pointing angle bracket = ket | No IE/NN |
| » | 187 | raquo | Right-pointing double angle quotation mark | |
| → | 8594 | rarr | Rightward arrow |
| ⇒ | 8658 | rArr | Rightward double arrow | No IE |
| ⌉ | 8969 | rceil | Right ceiling | No IE |
| ” | 8221 | rdquo | Right double quotation mark |
| ℜ | 8476 | real | Blackletter capital R = real part symbol | No IE |
| ® | 174 | reg | Registered sign | |
| ⌋ | 8971 | rfloor | Right floor | No IE |
| Ρ | 929 | Rho | Greek capital letter rho | |
| ρ | 961 | rho | Greek small letter rho | |
| | 8207 | rlm | Right-to-left mark | No IE |
| › | 8250 | rsaquo | Single right-pointing angle quotation mark | |
| ’ | 8217 | rsquo | Right single quotation mark | |
| ‚ | 8218 | sbquo | Single low-9 quotation mark |
| Š | 352 | Scaron | Latin capital letter S with caron | |
| š | 353 | scaron | Latin small letter s with caron | |
| ⋅ | 8901 | sdot | Dot operator | No IE |
| § | 167 | sect | Section sign | |
| | 173 | shy | Soft hyphen | No NN |
| Σ | 931 | Sigma | Greek capital letter sigma |
| σ | 963 | sigma | Greek small letter sigma | |
| ς | 962 | sigmaf | Greek small letter final sigma | |
| ∼ | 8764 | sim | Tilde oerator | IE? |
| ♠ | 9824 | spades | Black spade suit | IE? |
| ⊂ | 8834 | sub | Subset of | No IE |
| ⊆ | 8838 | sube | Subset of or equal to | No IE |
| ⁏ | 8271 | sum | N-ary summation | No IE/NN |
| ⊃ | 8835 | sup | Superset of | No IE |