This Practice Note compares the arbitration rules of major, key or leading arbitral institutions and organisations, namely: the International Court of Arbitration of the International Chamber of Commerce (ICC), the London Court of International Arbitration (LCIA), the United Nations Commission on International Trade Law (UNCITRAL), the American Arbitration Association (AAA), the China International Economic and Trade Arbitration Commission (CIETAC), the Swiss Arbitration Centre (SAC) (formerly the Swiss Chambers' Arbitration Institution or SCAI) (Swiss Rules), the Arbitration Institute of the Stockholm Chamber of Commerce (SCC), and the Hong Kong International Arbitration Centre (HKIAC). It compares the rules on the key issues of arbitral procedure, grounds for challenge/appeal, the award and costs. This includes considerations of jurisdiction, confidentiality, evidence, appointment of the tribunal and the availability of interim relief. This Practice Note also gives some guidance on which institution may be most appropriate in different circumstances. It also covers the important issue of dealing with costs under each set of rules. This may be referred to as: a comparison of major international arbitration institutions; a quick guide to the rules of the leading arbitral institutions and organisations; which arbitral institution and why; comparative chart of international arbitration rules; and, arbitral organisations and procedural rules.