- occupational safety and health review commission
- officers of a corporation
- official reports
- on a person's own recognizance
- open adoption
- opening statement
- opinion
- oral argument
- order
- ordinance
- overrule
- own recognizance
- paperbound supplement
- paralegal
- pardon
- parens patriae
- parol evidence
- parole
- parole
- partition
- partnership
- party
- patent
- patent
- patent and trademark office
- penalty phase
- pension plan
- per se doctrine
- peremptory challenge
- peremptory challenges
- periodical
- perjury
- perjury
- permanent injunction
- person in need of supervision
- personal guardian
- personal property
- personal recognizance
- personal recognizance
- personal representative