HMAS Sydney was a Chatham-class light cruiser of the Royal Australian Navy (RAN). Laid down in 1911 and launched in 1912, the cruiser was commissioned into the RAN in 1913. During the early stages of World War I, Sydney was involved in supporting the Australian Naval and Military Expeditionary Force, and escorting the first ANZAC convoy.
Sydney bus route 400 was a bus service in Sydney, Australia operated by State Transit between Bondi Junction and International Airport from 1989 until 2021. Until September 2018, it continued to Burwood. In its original form it was Sydney's busiest bus route.