Acronym

Description

M

Material Dispersion Parameter

M/W

Microwave

MA

Maintenance actions

MA

Maintenance Administrator

MA

Mechanized Mapper Assigner

MA

Metallic Access

mA

Milliampere

MAB

Metallic Access Bus

MAC

Machine-Aided Cognition (or Man and Computer)

MAC

Media Access Control

MAC

Medium Access Control

MACS

Mechanized Assignment and Control System

MACS

Moves, Adds, Changes (to workstations or other environmental/facility issues)

MADN

Multiple Appearance Directory Number

MADU

Multimount Asynchronous Data Unit

MAE

Major Account Executive (S)

MAF

Major Account Facility

MAG

Major Accounts Group (S)

MAG Data

Major Accounts Group - Data

MAGIC

Multidimensional Applications and Gigabit Working Consortium

MAIU

Multiple Access Interface Unit

MAN

Manual service

MAN

Metallic Access Network

MAN

Metropolitan Area Network

MAP

Maintenance and Administration Position

MAP

Manufacturing Automation Protocol (General Motors)

MAPI Messaging Application Programming Interface

MAPSS

Maintenance Analysis Plan for Special Service

MAR

Major Account Representative (S)

MAR

Memory Access Register

MAR

Memory Address Register

MARC

Machine-Readable Cataloging

MARCS

Mechanized Assignment and Record Conversion System

MARI

Mileage And Rate Information

MARS

Multi-user Archival Retrieval System

MAS

Main Store

MAS

Management Analysis System

MASA

Main Store Array

MASC

Main Store Controller

MASC

Multiple Award Schedule Contract

MASER

Microwave Amplification by Simulated Emission of Radiation

MAT

Multiple Access Station Rearrangement Training

MATR

Minimum Average Time Requirement

MAU

Math Accelerator Unit

MaxCT

Maximum Corrective Maintenance Time

MB

Megabyte

MB

Megabyte or 106 bytes

MBA

Management Billing Advantage (SM)

MBE

Molecular Beam Epitaxy

MBE

Multibutton Telephone Equipment

MBKS

Multibutton Key Services

MBKU

Multibutton Key Telephone Unit

MBO

Management by Objective

Mbps

Megabits per Second

Mbps

Megabits per Second

MBQ

Modified Biquinary Code

MBT

Make Blocked Trunk list

MBU

Maintenance Busy

MC

Management Center

MC

Module Control

MC

Module Controller

MCA

Multiple Call Appearances

MCC

Maintenance Control Center

MCC

Maintenance Control Circuit

MCC

Master Control Console

MCC

Microelectronics Computer and Technology Corporation

MCCS

Mechanized Call Card Service

MCCS

Mechanized Calling Card Service

MCH

Malicious Call Hold

McIAS

Multichannel Intercept Announcement System (Cognitronics)

MCM

Multicarrier Modulation

MCP

Master Control Program

MCP

Memory Card Present

MCR

Move, Change, and Rearrangement

MCS

Management Center System

MCS

Microprocessor Controlled System

MCT

Mean Corrective Maintenance Time

MCTSI

Module Controller/Time Slot Interchanger

MCU

Module Control Unit

MCVF

Multi-Channel Voice Frequency

MCW

Memory Card Writer

MCW

Modulated Continuous Wave

MD

Manufacture Discontinued

MD

Multiple Dissemination

MDA

Manufacturing Defect Analyzer (MFG)

MDC

Message and Device Controller

MDF

Main Distributing (Distribution) Frame

MDII

Machine Detected Interoffice Irregularities

MDM

Modular Data Module

MDNS

Managed Data Network Services

MDR

Message Detail Record(ing)

MDS

Methods Development Standards

MDS

Modular Documentation System

MDS

Multiple Dataset System

MDT

Mean Downtime

MDT

Modular Display Telephone

MDW

Military District-Washington

MEB

Mate Exchange Bus

MEDLARS

Medical Literature Analysis and Retrieval System

MEDLINE

MEDLARS On-Line System

Megabyte

106 bytes

MELD

Mechanized Engineering and Layout of Distributing Frame

MEP

Market Expansion Program

MER

Most Economical Routing

MERS

Most Economical Route Selection

MES

Multiline Electronic Sets

METL

Mechanized Equipment Test List

METS

Mobile Equipment Tracking System

MEU

Memory Expansion Unit

MEX

Memory Extension

MF

Mediation Function

MF

Multifrequency

MFC

Modular Feature Customization

MFC

Multi-Function Controller

MFJ

Modified Final Judgment

MFLOPS

Million Floating Point Operations Per Second

MFOS

Multifunction Operations System

MFR

Multifrequency Ringing

MFT

Metallic Facility (ies) Terminal

MFT

Multiprogramming with a Fixed Number of Tasks

MG

Master Group

MHD

Moving Head Disk

MHz

Megahertz

MI

Message Interface

MI2

Message Interface - Model 2

MIB

Management Information Base

MIB

Message Interchange Bus

MIB

Message Interface Bus

MIB

Metallic Interface Bus

MIBC

Message Interchange Bus Controller

MICR

Magnetic Ink Character Recognition

MICU

Message Interface and Clock Unit

MICU

Message Interface Control Unit

MIDAC

Michigan Digital Automatic Computer

MIDAS

Multiple Indexed Data Access System

MIL

Military

MILPERCEN

Military Personnel Center

MIMD

Multiple-Instruction Stream, Multiple-Data Stream

MIMR

Magnetic Ink Mark Recognition

MIP

Marketing Information Packet

MIP

Medium Interface Point

MIPS

Million Instructions Per Second

MIS

Management Information System

MIS

Marketing Information System

MIS

Miscellaneous Bay

MISC

Miscellaneous

MISD

Multiple-Instruction Stream, Single-Data Stream

MIU

Multistation Interface Unit

MLH

Multiline Hunting

MLHG

Multiline Hunt Group

MLI

Message Link Interface

MLL

Monthly Leased Lines System

MLN

Main Listed Number

MLPP

Multilevel Precedence and Preemption

MLSS

Machine Load Service Summary

MLT

Mechanized Loop Test(ing)

MM

Memory Module

MM

Model Management (IS)

MMCS

Materials Management Customer Service

MMIS

Materials Management Inventory System

MML

Man-Machine Language

MMOC

Minicomputer Maintenance Operation Center

MMP

Maintenance Management Plan

MMP

Module Message Processor

MMR

Manual Material Request (MFG)

MMRG

Minimum Monthly Revenue Guarantee

MMRSM

Multimode Remote Switching Module

MMRSM

Multimodule Remote Switching Module

MMS

Maintenance Management Subsystem

MMS

Material Management Services

MMSU

Modular Metallic Service Unit

MMSU

Modular Metallic Service/Switch Unit

MMU

Memory Management Unit

MNCS

Multipoint Network Control System

MNP

Microcom Networking Protocol

MOCVD

Metal Organic Chemical Vapor Deposition

Modem

Modulator-demodulator

MOL

Material On Loan

MOL

Maximum Order Limit

MOP

Method of Procedure

MOP

Method of Procedure

MOR

Mini-Output Report

MOR

Monthly Operating Report (MFG)

MOS

Metal(lic)-Oxide Semiconductor

MOSFET

Metal-Oxide Semiconductor Field-Effect Transistor

MOU

Minutes of Use

MOY

Month Of Year

MP

Master Processor

MP

Module Processor

MPA

Manufacturing Program Analysis

MPCC

Multi-Protocol Communications Controller

MPG

Microwave Pulse Generator

MPL

Multischedule Private Line

MPM

Modem Pool Member

MPOP

Minimum Point of Penetration

MPP

Multiprotocol Switching PAD

MPR

Monthly Performance Report (MFG)

MPR

Multiplex Project Requirements

MPS

Message Processing System

MPS

Message Processing System (B)

MPSC

Multi-Protocol Serial Controller

MPTA

Modem Pool Terminal Adapter

MPU

Microprocessing Unit

MQ

Modular Queuing

MQ

Multiplier-Quotient

MQR

Multiplier-Quotient Register

MR

Modification Request

MRA

Material Return Authorization

MRB

Material Review Board (MFG)

MRC

Monthly Recurring Charge

MRC

Monthly Recurring Charge

MRS

Management Reporting System

MRT

Mean Recovery Time

MRT

Mean Restoral Time

MS

Main Station

MS

Management Services

MS

Management System (Suntel C3 computer system)

MS

Master Scanner circuit

MS

Microprocessor System

ms

Milliseconds

MS

Module Structure

MSB

Make Set Busy

MSB

Message Signaling Buffer

MSB

Message Switch and Buffer (or Message Switch Buffer)

MSB

Message Switch Buffer

MSB

Most Significant Bit (or byte)

MSBI

Make Set Busy, Intragroup

MSC

Message Switch Control

MSCU

Message Switch Control Unit

MSCU2

Message Switch Control Unit - Model 2

MSE

Marketing Support Engineering

MSG

Message

MSG

Message Switch

MSGS

Message Switch

MSGS2

Message Switch Model 2

MSI

Medium-Scale Integration

MSIA

Management Specific Information Area

MSK

Minimum Shift Keyed Modulation

MSL

Maintenance Stocking Location

MSLPU

Medium Speed Line Processing Unit

MSNF

Multisystem Networking Facility

MSPU

Message Switch Peripheral Unit

MSPU2

Message Switch Peripheral Unit Model 2

MSPU3

Message Switch Peripheral Unit Model 3

MSR

Monthly Status Review

MSS

Mass Storage System

MSS

Message Service System

MSU

Metallic Service Unit

MSUDC

Michigan State University Discrete Computer

MT

Machine Translation

MTA

Message Transfer Agent

MTA

Message Transport Address

MTA

Metallic Access Network (Northern Telecom DMS-100)

MTA

Metallic Test Access

MTAS

Mechanized Trouble Analysis System

MTB

Metallic Test Bus

MTBF

Mean Time Between Failures

MTBF

Mean Time Between Failures

MTBO

Mean Time Between Outages

MTBPM

Mean Time Between Preventive Maintenance

MTC

Master Terms and Conditions

MTD

Magnetic Tape Drive

MTE

Mobile Telephone Exchange

MTF

Material Transfer Form

MTF

Mean Time to Failure

MTF

Modulation Transfer Function

MTIB

Metallic Test Interconnect Bus

MTIB

Metallic Test Interface Bus

MTL

Minimum Termination Liability

MTM

Maintenance Trunk Module

MTM

Maintenance Trunk Monitor

MTN

Maintenance

MTN

Message Transfer Network

MTP

Message Transfer Part

MTP

Message Transfer Part (SS7)

MTP

Monitor Terminal Process

MTR

Mechanized Time Reporting

MTS

Measured Telephone Service Core Team

MTS

Message Telecommunications Service

MTS

Message Toll Service

MTS

Message Transport Service

MTS

Michigan Terminal System

MTS

Mobile Telephone Service

MTSR

Mean Time to Service Restoral

MTTF

Mean Time to Failure

MTTF

Mean Time To Fix

MTTI

Mean Time To Investigate

MTTN

Mean Time To Notify

MTTR

Mean Time to Repair

MTTR

Mean Time to Respond

MTTR

Mean Time to Restore

MTTYPC

Maintenance Teletypewriter Peripheral Controller

MTU

Magnetic Tape Unit

MTU

Metallic Test Unit

MTX

Mobile Telephone Exchange

MU

Message Unit

MUF

Maximum Usable Frequency

MUG

Manual Users Group

muldem

Multiplexer/demultiplexer

MULTICS

Multiplexed Information and Computer Service

MUMR

Multi-Unit Message Rate

MUPH

Multiposition Hunt

MUX

Multiplexer

MVP

Multiline Variety Package

MVS

Multiprogramming with Virtual Storage

MVT

Multiprogramming with a Variable Number of Tasks

MW

Megawatt (electrical)

MW

Megaword

MWI

Message Waiting Indicator