Miscellaneous Technical
⌈ ⌈ left ceiling = apl upstile, U+2308 ISOamsc
⌉ ⌉ right ceiling, U+2309 ISOamsc
⌊ ⌊ left floor = apl downstile, U+230A ISOamsc
⌋ ⌋ right floor, U+230B ISOamsc
〈 ⟨ left-pointing angle bracket = bra, U+2329 ISOtech (lang is NOT the same character as U+003C 'less than' or U+2039 'single left-pointing angle quotation mark')
〉 ⟩ right-pointing angle bracket = ket, U+232A ISOtech (rang is NOT the same character as U+003E 'greater than' or U+203A 'single right-pointing angle quotation mark')