Electrical Engineering Glossary Definition for SMBus - Maxim   [Open results in new window]
... Bus: A 2-wire serial-interface standard developed by Intel. Synonyms: SMBus I/F;
System Management Bus. See Also: Show application notes for: "SMBus"; I2C. ...
www.maxim-ic.com/glossary/index.cfm/Ac/V/ID/284/Tm/SMBus - 19k

Electrical Engineering Glossary Definition for I2C - Maxim   [Open results in new window]
... SMBus is electrically similar — see Comparing the I2C Bus to the SMBus. ... Synonyms:
IIC; inter-IC bus. See Also: Show application notes for: "I2C"; SMBus. ...
www.maxim-ic.com/glossary/index.cfm/Ac/V/ID/988/Tm/I2C - 20k