A tutorial on the Open Systems Interconnection (OSI) networking reference model plus tips on how to memorize the seven layers.

US-based OSI Group, owner of the Shanghai Husi Food, bids to repair its reputation with big investment in a 3-year food safety education campaign in China.

OSI group has more than 60 meat processing factories in over 16 countries, processing food for many fast food chains. Follow China.org.cn on Twitter and Facebook to join the conversation.