Definition of "RSA"

RSA

proper noun
1. (art, UK) Initialism of Royal Society of Arts.
2. Initialism of Republic of South Africa.
3. (cryptography) Initialism of Rivest-Shamir-Adleman (“an encryption algorithm”).
noun
countable and uncountable, plural RSAs
1. (Australia, hospitality) Initialism of Responsible Service of Alcohol (a qualification and permit for bar staff).
  Quotations
  The Responsible Service of Alcohol (RSA) is more than just a training course. It is a complete system which includes training, testing, reporting and operational policy and procedures support.
  1999, Linda A. Jerris, Human Resources Management for Hospitality‎, page 516
  Note that it may be necessary to acquire a certificate, for example the RSA (Responsible Service of Alcohol) and/ or RCG (Responsible Conduct of Gambling) before being eligible for employment on licensed premises.
  2007, Transitions Abroad, Volume 30, Issues 4-6, page 65
  Add in tighter RSA (responsible service of alcohol) and the need to control crowd behaviour, and you can see it′s a fine line we have to tread.
  2007, Peter Rix, Marketing: A Practical Approach‎, page 3
  In Australia, for example, many employers require you to complete a Responsible Service of Alcohol (RSA) course, a six-hour course about when to stop serving customers who have had a little too much.
  2008, George Dunford, Matthew D. Firestone, Anthony Ham, The Big Trip: Your Ultimate Guide to Gap Years and Overseas Adventures, Lonely Planet, page 127
2. (aviation) Initialism of runway safety area.
3. (fishing) Initialism of recreational sea angler.
4. (transport) Initialism of road safety authority.