O
\O
blockend

o
\o
blockend

oddsidemargin
\oddsidemargin0pt
blockend

odot
\odot
blockend

OE
\OE
blockend

oe
\oe
blockend

oint
\oint
blockend

Omega
\Omega
blockend

omega
\omega
blockend

ominus
\ominus
blockend

onecolumn
\onecolumn
blockend

opening
\opening{}
blockend

oplus
\oplus
blockend

originalTeX
\originalTeX
blockend

oslash
\oslash
blockend

otimes
\otimes
blockend

oval
\oval(,)[]
blockend

overbrace
\oberbrace{}^{}
blockend

overline
\overline{}
blockend