RA

RA may refer to:

Science

Registered Architect, a professional suffix typically used if not also a member of an architecture professional association
Research assistant, a graduate student employed by a college or university for the purpose of academic research
Research associate, a post-doctoral academic researcher
Resident assistant or advisor, a student who supervises tenants of a residence hall
Royal Academician, one of the 80 practicing artists elected as a member of the Royal Academy

Registration authority, a body which maintains lists of international standards codes
Regulatory Affairs, a department in charge of industry-government relations
Rowing Australia, governing body for the sport of rowing in Australia
Resettlement Administration, a New Deal government program in the United States

Regular Army, the permanent force of the US Army that is maintained during peacetime
Royal Artillery, a regiment of the British Army
Russian Army, also known as the Russian Ground Forces, formed in 1992

Resolution Advisory, an aircraft instruction from a Traffic Collision Avoidance System
Radar altimeter

Radhiallahu 'anhu, an Arabic phrase uttered after a righteous person's name
Risk assessment, a step in a risk management procedure
Risk analysis
Remittance advice, a letter sent by a customer to a supplier, to inform the supplier that their invoice has been paid
Republic Act, nomenclature used for Philippine laws from 1946 to 1972 and after 1987
Ritual Abuse, sometimes known as Religious abuse, abuse administered under the guise of religion
Random Arrest, a term used on Garry's Mod roleplay servers.