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The country has not confirmed that it has actually blocked Google services, but censorship is the likely culprit as the 25th anniversary of the uprising nears.
The social network's Chinese website blocks objectionable content globally -- a policy the company says it is "strongly considering changing."
The new operating system is expected to launch initially on desktops in October, with support for mobile devices coming later.
Wielding your own leg like a gun is the latest hot thing for selfies -- started by Chinese artist and activist Ai Weiwei.
American tech firms are caught in the cross-fire between China and the US over cyberespionage. International politics specialist Shen Yi says this storm isn't likely to blow over soon.
Chinese monitoring site GreatFire says Microsoft is filtering certain search results. Microsoft pins the blame on a system error.
One U.S. researcher has deconstructed a constantly updated file in the China-only version of Skype that contains a list of more than 1,100 words used to censor and monitor its users.
Google, Gmail, and other Google offerings seem to be available again, after an apparent blockage coinciding with the start of the 18th Communist Party Congress, and related protests.
A New York Times report detailed the family wealth of Prime Minister Wen Jiabao, and the Chinese government was not amused.
As violence erupts over controversial video, YouTube's options boil down to bad and worse.