M

See mega-.

m?

(milliohm) abbr. See milliohm.

M?

(megaohm) abbr. See megaohm.

M/M/1 queue

(em em one cue) n. The simplest statistical queueing model. The first M is for memoryless arrival time. The second M is for memoryless service time. The 1 refers to the fact that there is just one queue and one servicer of messages. In plain English then, this model describes queues that see messages arrive at times independent of each other and receive messages that have processing times independent of those previously processed. Such queues are the easiest to analyze.

Further Reading: Kalinsky, David. How to Size Message Queues, Embedded Systems Programming, May 2003.

mA

(milliamp) abbr. See milliamp.

MAC

(like the truck) 1. abbr. See multiply-and-accumulate.

2. See MAC address.

MAC address

n. A globally unique 48-bit hardware address assigned to each device on a network. Every system on a physical network, like Ethernet or Token Ring, includes a peripheral called a network controller. This chip is the processor s interface to the physical communications medium. As part of its initialization, the network controller must be fed a unique hardware address to use when communicating over the network. In the case of Ethernet, the hardware address is a 48-bit value. To guarantee global uniqueness, the upper 24 bits are controlled by the IEEE, which allocates them to individual device manufacturers. See OUI for more information about obtaining a block of Ethernet addresses for your company.

Further Reading: http://www.netrino.com/Connecting/2000-06/

machine language

n. The very...