' (disambiguation)

The character is represented by 39 in ASCII and in Unicode. It is used as:

Apostrophe (as straight version of the character), a punctuation mark, and sometimes a diacritical mark
Single quotation mark (as straight version of the and characters)

Informal use

Being supplied as standard on many keyboard layouts, it is often used in informal contexts to replace other similar looking characters that include:

Acute accent (), a diacritic used in many modern written languages
The ASCII symbol is not used as a diacritic.
Aleph (), is the first letter of the Semitic abjads
Apex (), a diacritic used to indicate a long vowel in Latin
Dakuten, japanese diacritic
Geresh (), a sign in Hebrew writing
Smooth breathing or (), a diacritical mark used in polytonic orthography
Tonos (), single diacritic that indicates stress in monotonic orthography for Modern Greek
Keraia (diacritic) () a symbol used in Greek numerals

Modifier letter apostrophe (), a glyph used primarily to represent various glottal sounds.
Modifier letter left half ring (), a character used to transliterate the letter ayin, representing the sound ʕ
Modifier letter right half ring ()
Modifier letter turned comma ()

Okina (), commonly representing a phonemic glottal stop in various Polynesian languages
Ejective consonant (), used in the International Phonetic Alphabet
Greek diacritics ()()()(), marks added to letters in Greek (particularly Ancient Greek) sometimes in combination (eg. or )
Saltillo (linguistics) ( or ), a glottal stop consonant, ʔ
Stress (linguistics) (), relative emphasis or prominence given to a certain syllable in a word

Prime (symbol) (), used to designate units and for other purposes in mathematics, the sciences, linguistics, and music
Foot (unit), a unit of length in the imperial and US customary systems of measurement
Minute, a unit of time
Minute of arc, a unit of arc