3M, one of the country's biggest manufacturers, is about to expand into the service industry. The idea is to sell contracts to customers who buy products that need ongoing services. 3M's CEO James McNerney's (mick-NER-knee's) new strategy could add a whole new dimension to the 16 billion dollar company. 3M's move is the topic of an article in this week's edition of "The Business Journal." Reporter Sam Black, who wrote the article, says the company is looking to develop ongoing relationships with its customers.