MAC

Proper noun

 * 1)   formerly, one of three former divisions of the US airforce, the others being SAC and TAC.

Noun

 * 1)   the maximum concentration of a pollutant which is considered harmless to healthy adults during their working hours, assuming they breathe uncontaminated air at all other times.
 * 2)   the portion of Ethernet, Wi-Fi 802.11 wireless, Bluetooth, FDDI, ATM, and  networks that controls which hardware devices have access to the media over which signals are sent.
 * 3)   a part of the complement system of the innate immune system.
 * 4)   a hardware module found in digital signal processors which performs a multiplication and adds the result of that operation to an accumulator in the same cycle, used extensively in implementations of digital filters, transforms, and codecs.
 * 1)   a part of the complement system of the innate immune system.
 * 2)   a hardware module found in digital signal processors which performs a multiplication and adds the result of that operation to an accumulator in the same cycle, used extensively in implementations of digital filters, transforms, and codecs.
 * 1)   a part of the complement system of the innate immune system.
 * 2)   a hardware module found in digital signal processors which performs a multiplication and adds the result of that operation to an accumulator in the same cycle, used extensively in implementations of digital filters, transforms, and codecs.
 * 1)   a part of the complement system of the innate immune system.
 * 2)   a hardware module found in digital signal processors which performs a multiplication and adds the result of that operation to an accumulator in the same cycle, used extensively in implementations of digital filters, transforms, and codecs.
 * 1)   a hardware module found in digital signal processors which performs a multiplication and adds the result of that operation to an accumulator in the same cycle, used extensively in implementations of digital filters, transforms, and codecs.