clipped from: www.nzherald.co.nz 
BEIJING - China is requiring personal computers sold in the country to carry software that blocks online pornography and other websites, potentially giving one of the world's most sophisticated censorship regimes even more control over the internet.
Parents can also add their own sites to the blocking list, Zhang Chenmin, general manager of Jinhui, said.
"If a father doesn't want his son to be exposed to content related to basketball or drugs, he can block all websites related to those things," Zhang said.
China, which has the world's largest population of internet users at more than 250 million, also has one of the world's tightest controls over the internet.
A separate notice on its website said all primary and secondary schools were required to install the Green Dam software on every school computer by the end of last month.