Which company introduced its Personal Computer in 1981, running Microsoft's DOS?

Steve Garvey, Fernando Valenzuela and Ron "The Penguin" Cey were stars for which 1981 World Series champions? Who sang the 1981 hit "Stop Draggin' My Heart Around" with Tom Petty? Complete the title of the South African comedy that became an international hit in the early 1980s: "The Gods Must Be _… Which band's 1981 "Tattoo You" tour was the biggest-grossing tour of the year? In which 1981 film does runner Eric Liddell say "When I run, I feel His pleasure"? In which 1981 film is a prisoner told "You go in, find the President, bring him out in 24 hours, and you're a free man"? In which 1981 sci-fi film does a former James Bond play a marshal investigating drug deaths among miners on Io? "Under Pressure" (1981) was a hit by Queen and which other rock star?