Sam Grobart looks at what effect the departures of Steven P. Jobs have had on Apple and its products. Steve Jobs’s announcement on Jan. 14 that he will be taking a medical leave from Apple is not the first time the company will go without his services, as Mr. Jobs was not at Apple from 1985 to 1997. A look at Apple’s products before, during and after that time shows what effect Mr. Jobs has had on the company. It’sHere