RSA

1. UKabbreviationinitialismartInitialism of Royal Society of Arts.
2. South AfricaabbreviationinitialismInitialism of Republic of South Africa.
3. CanadaabbreviationinitialismlawInitialism of Revised Statutes of Alberta.
4. abbreviationinitialismcomputerInitialism of Rivest-Shamir-Adleman (“an encryption algorithm”).

plural RSAs

1. AustraliaabbreviationcountableinitialismuncountablehospitalityInitialism of Responsible Service of Alcohol (a qualification and permit for bar staff).

   2007, Transitions Abroad, Volume 30, Issues 4-6, page 65, 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.

   3 more examples

   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

   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. abbreviationcountableinitialismuncountableaeronauticsInitialism of runway safety area.
3. abbreviationcountableinitialismuncountablefishingInitialism of recreational sea angler.
4. abbreviationcountableinitialismuncountabletransportInitialism of road safety authority.