An operating system performs these services for applications: In a multitasking operating system where multiple programs can be running at the same time, the operating system determines which applications should run in what order and how much time should be allowed for each application before giving another application a turn.
St. Patrickâs Day. Every year on March 17, the Irish and the Irish-at-heart across the globe observe St. Patrickâs Day. What began as a religious feast day for the patron saint of Ireland has become an international festival celebrating Irish culture with parades, dancing, special foods and a whole lot of green. 1  Facebook. 2  Twitter. 3  Google.
St. Patrick's Day, also spelled Saint Patrick's Day and sometimes colloquial referred to as St. Paddy's Day, is a public holiday in the Republic of Ireland and Northern Ireland. It is one of the four Saints' days of the four nations that make up the United Kingdom: