Toto (est. in 1968 and stylized as TOTO) is a legalized form of lottery sold in Singapore, known by different names elsewhere. It is held by Singapore Pools, the only legal lottery operator in Singapore. As of April 2015, it was the second most popular type of gambling activity after 4-Digits. The profits from Toto go to the Singapore Totaliser Board (the owner of Singapore Pools) which uses the money for charity and other worthy causes.
Official link: https://www.singaporepools.com.sg/