Bluetooth is a standard developed by a group of electronics manufacturers that allows any sort of electronic equipment from computers and cell phones to keyboards and headphones to make its own connections, without wires, cables or any direct action from a user.

More on Introduction of Bluetooth

www.howstuffworks.com/bluetooth.htm

www.infotooth.com/bluearticles/intro.asp

www.bluefrogsolution.com/introduction.asp

More on Architecture of Bluetooth

http://developer.intel.com/technology/itj/q22000/articles/art_1.htm

www.enea.se/kurskatalog/bluetooth_architecture.html

http://mason.gmu.edu/~nhartiga/architecture.html

The continuing technology of BlueTooth may not have been possible if it wasn't for the collaboration of nine major telecom and computer companies. The following companies that make up the BlueTooth Special Interest Group are: Toshiba, Nokia, Motorola, Microsoft, Lucent, IBM, Intel, Ericsson, 3 Com. These big investers made this new technology possible. From around the world, another thirteen hundred companies have contributed to the BlueTooth Technology. Thus making it the fastest growing industry of its time (BlueTooth). 

For the privacy of Bluetooth users, the technology is encrypted and has authentication routines. It is also so secure that it still works in an environment that has a lot of noise with out interference (Official) . It can go from cell phones to lap tops to your computer with out being interupted.

More on Security Architecture of Bluetooth

http://www.cs.utk.edu/~dasgupta/bluetooth/

http://www.niksula.cs.hut.fi/~jiitv/bluesec.html

Bluetooth Core Protocols (7):

Baseband - Link Manager Protocol - Logical Link Control and Adaptation Protocol - Service Discovery Protocol - Cable Replacement Protocol - Telephony Control Protocol - Adopted Protocols

More on Protocols in Bluetooth Architecture:

http://www.cs.utexas.edu/users/ypraveen/surveys/wlan_security/node7.html

www.csd.uwo.ca/courses/cs457a/reports/handin/jhewitt/A2/protocols.htm

Bluetooth Protocol Stack

http://www.stonestreetone.com/bluetooth/products/stack/index.shtml