Google's move also put pressure on large multinationals, at a time when many are feeling their own tensions in China. Google said its internal investigation showed at least 20 other companies were affected. People familiar with the attack say at least 34 companies in the Internet, finance, technology, media and chemical sectors were hit by the cyber attacks. Only Adobe Systems Inc. has publicly verified an incident so far. Another company, Rackspace Hosting Inc., says it was victimized as part of the attack on Google.