⟨ ⟩

⟨ ⟩

1. (mathematics) Encloses the inner product of two vectors.
2. (mathematics) Denotes the expectation value of something.

⟨ ⟩

1. (linguistics) Encloses orthographic representation.
2. (papyrology, epigraphy) Encloses restored writing that was mistakenly omitted by the original scribe.

For these uses, the characters U+27E8 MATHEMATICAL LEFT ANGLE BRACKET and U+27E9 MATHEMATICAL RIGHT ANGLE BRACKET should be used. The characters U+2329 LEFT-POINTING ANGLE BRACKET and U+232A RIGHT-POINTING ANGLE BRACKET are "deprecated and are strongly discouraged for mathematical use because of their canonical equivalence to CJK punctuation."[1]

• < >

• / / (for phonemic representation in linguistics)
• [ ] (for phonetic representation in linguistics)

〈 〉

1. Encloses titles of books when embedded within a book title.
2. Encloses titles of sections of a book.

• 《 》

〈 〉

1. Encloses titles of books.