On type:
- abu
- letteral for a.
- a'ebu
- letteral for ash (æ)
- arur bu
- letteral: at sign, commercial at (@).
- canlu bu
- space (character)
- claxu bu
- letteral: ellipsis mark (letteral).
- dac bu
- letteral: dash (letteral).
- denpa bu
- letteral: Lojban "." character.
- du'u bu
- the last sumti having a {du'u}-abstraction at its topmost level inside
- dy.bu
- letteral for ð (eth)
- ebu
- letteral for e.
- ekar bu
- letteral for open-e (ɛ)
- epsi bu
- digit/number: dual ε of dual number in linear algebra; square root of 0
- gerku bu
- letteral: dog symbol, "U•ᴥ•U".
- gi bu
- pro-sumti: in the second half of a sumti forethought connective expression, refers to the first half.
- gimet bu
- letteral: guillemet (letteral).
- ibu
- letteral for i.
- jei bu
- pro-sumti: refers to last complete sumti that started with a jei-abstraction
- joibu
- letteral: ampersand character; especially used in standing for a mixed connective.
- jorne bu
- letteral: hyphen (letteral).
- ka bu
- the last sumti having a {ka}-abstraction at its topmost level inside
- ky.bu
- Letteral: “q” character
- la'o bu
- pro-sumti: refers to last la'o-quoted name.
- li'i bu
- pro-sumti: refers to the last complete sumti that started with a li'i-abstraction
- lu bu
- pro-sumti: refers to the last complete {lu}-quotation
- mu'e bu
- pro-sumti: refers to the last complete sumti that started with a mu'e-abstraction
- ng bu
- letteral for eng/engma/agma (ŋ)
- ni bu
- the last sumti having a {ni}-abstraction at its topmost level inside
- nu bu
- pro-sumti: refers to the last complete sumti that started with a nu-abstraction
- obu
- letteral for o.
- okar bu
- letteral for open-o (ɔ)
- paubu
- letteral: '?' symbol
- pu'u bu
- pro-sumti: refers to the last complete sumti that started with a pu'u-abstraction
- ronru'u bu
- letteral: euro coinage sign (letteral).
- saibu
- letteral: '!' symbol
- semikolon bu
- letteral: semicolon (letteral).
- si'o bu
- pro-sumti: refers to the last complete sumti with a si'o-abstration
- sitna bu
- letteral: quotation mark (letteral).
- slac bu
- letteral: slash (letteral).
- slaka bu
- letteral: Lojban ',' character.
- su'u bu
- pro-sumti: refers to the last complete sumti that started with a su'u-abstraction
- ty.bu
- letteral for þ (thorn)
- ubu
- letteral for u.
- uibu
- letteral: happiness symbol (letteral).
- veibu
- letteral: left bracket (letteral).
- ve'obu
- letteral: right bracket (letteral).
- vy.bu
- Letteral: “w” character
- vy'ybu
- letteral for ꝡ (used in Toaq)
- xy.bu
- letteral for "h" character
- ybu
- letteral for y.
- y'y.bu
- letteral for "h" character
- za'i bu
- pro-sumti: refers to the most recent sumti that started with a za'i-abstaction
- zoi bu
- pro-sumti: refers to last zoi-quotation.
- zo'obu
- letteral: humor symbol, ':-)' and its related forms expressing humor (letteral).
- zu'o bu
- pro-sumti: refers to the last complete sumti that started with a zu'o abstraction