online music service Pandora Media Inc., which has filed papers for an anticipated initial public offering, disclosed Monday that it was served with a subpoena to produce documents for a federal grand jury probing information sharing by mobile applications.

“In early 2011, we were served with a subpoena to produce documents in connection with a federal grand jury, which we believe was convened to investigate the information sharing processes of certain popular applications that run on the Apple and Android mobile platforms,” Pandora said.

Apple Inc. and Google Inc. provide two of the most popular software systems for mobile devices. Pandora, which filed for its IPO in February, said it was informed that it is not a target of the investigation, adding, “We believe that similar subpoenas were issued on an industry-wide basis to the publishers of numerous other smartphone applications.”

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