Apple's Tim Cook joins Twitter

Apple chief executive Tim Cook joined Twitter on Friday, as huge crowds formed around the world to buy up the California giant's two new iPhones.

Iran foreign minister says Facebook page hacked

The Facebook page of Iran's foreign minister was taken over briefly by unidentified hackers who protested against the crackdown on protesters after the disputed 2009 presidential election, media reported Saturday.

Twitter announces plans for stock offering

Twitter announced Thursday, in a tweet, that it has submitted papers for a stock offering, the most hotly anticipated in the tech sector since Facebook's last year.

Instagram, other sites go down

Amazon's unit that runs Web servers for other companies had problems Sunday that coincided with outages or slowdowns on several popular websites.

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