) --


(AMZN) - Get Report

said Tuesday it is starting a cloud-based service called Cloud Player that would let people store music and video online and access it through their Android-based smartphone or computer. Both


(GOOG) - Get Report



(AAPL) - Get Report

are said to be exploring cloud-based streaming music services, as well.

Shares of Amazon rose 0.7% to $170.47 in pre-market trading Monday.

Apple was forced to evacuate its offices in Elk Grove, Calif., following a bomb threat. The office serves as a distribution and call center for the company and is located about 125 miles northeast of its main headquarters in Cupertino, Calif.

Shares of Apple fell 0.7% in pre-mareket trading Monday to $347.92.


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, the Seattle-based digital software company, announced Monday the sudden departure of its chief executive Robert Kimball, who leaves after just a year on the job. The board appointed executive vice president Mike Lunsford to replace Kimball while it launches a search for a new CEO.


said Tuesday it has hired Mark D'Arcy, the president of

Time Warner's


Global Media Group, to develop the social networking giant's advertising business. D'Arcy will be based in New York and will report to Mike Hoefflinger, Facebook's director of global customer marketing.


co-founder Jack Dorsey, who left the microblogging site in 2008, said Monday he is returning as head of product development. Twitter's former product exec, Evan Williams, has reportedly stepped back from working at Twitter on a daily basis to explore a new start-up idea, although he remains a director.

--Written by Olivia Oran in New York.

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