What does the 'S' represent in the bank name HSBC?

HSBC, officially known as "The Hongkong and Shanghai Banking Corporation Limited", is a wholly owned subsidiary of HSBC, the largest bank in Hong Kong. It operates branches and offices throughout the Asia Pacific region, and in other countries around the world. It is also one of the three commercial banks licensed by the Hong Kong Monetary Authority to issue banknotes for the Hong Kong dollar.

"The Hongkong and Shanghai Bank" was established in British Hong Kong in 1865 and was incorporated as "The Hongkong and Shanghai Banking Corporation" in 1866, and has been based in Hong Kong (although now as a subsidiary) ever since. It was renamed "The Hongkong and Shanghai Banking Corporation Limited" in 1989. It is the founding member of the HSBC Group of Banks and Companies, since 1990, is the namesake and one of the leading subsidiaries of the London-based HSBC Holdings PLC. The company's business ranges from the traditional High Street roles of retail banking, commercial banking, corporate banking to investment banking, private banking and global banking.