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.
Background. St Patrick is one of Ireland's patron saints. He is believed to have died on March 17 in or around the year 493. He grew up in mainland Britain, but spent time in Ireland as a young man and later as a missionary.