Google, Yahoo and Microsoft have undermined the rights of Chinese to freedom of expression through their actions in China, Amnesty International said in a report."All three companies have, in one way or another, facilitated or colluded in the practice of censorship in China," Amnesty said in the report, noting these actions contradict the companies\u2019 stated values. The full report, titled "Undermining freedom of expression in China," is available online.This is not the first time that Amnesty has criticized the business practices of these three companies. Yahoo has taken heat for handing over user information that helped Chinese authorities identify and jail dissidents, including Shi Tao, a journalist imprisoned in 2005 for 10 years.Microsoft and Google have also faced criticism from Amnesty and other human rights groups. Microsoft shut down a blog on its MSN Spaces website following a request from the Chinese government, and Google introduced a censored version of its search engine specifically designed for China.Amnesty applauded Google\u2019s admission that its actions in China were at odds with its stated corporate mantra of "don\u2019t be evil," saying this was a first step. Google can go further by being more transparent about its censorship of search results in China, it said.Google currently discloses to Chinese users when information has been removed from its search results in response to local laws, the company said in a statement made in response to the report. That provides some transparency and "is a step in the right direction," Google said.Also, Google doesn\u2019t offer services like blogging or e-mail in China because it can\u2019t guarantee the privacy of customers using such offerings, the company said. Google.cn, the censored version of the search engine, will provide benefits to Chinese Internet users, and Google\u2019s offerings in China meaningfully expand access to information there,\u00a0the company\u00a0said. Representatives for Yahoo and Microsoft in Asia and Europe did not respond to requests for comment. In the past, they have defended their business practices in China, saying they must follow local laws.Yahoo, which has since handed over its Chinese operations to Alibaba.com, was singled out for the harshest criticism. "Yahoo actions have, in particular, assisted the suppression of dissent with severe consequences for those affected," the report said.Amnesty called on all three companies to take several measures, aimed at ensuring better freedom of expression in China. Those measures include making public all agreements with the Chinese government that related to the censorship of information. In addition, the group called on them to make public the list of words that are censored by content filters.\n\n-Sumner Lemon, IDG News Service (Beijing Bureau)(Nancy Gohring in Dublin contributed to this report.)\n\nCheck out our CIO News Alerts and Tech Informer pages for more updated news coverage.