| A-M |
| Ai | Inherent Availability |
| Ao | Operational Availability |
| AoA | Analysis of Alternatives / Angle of Attack |
| AFMETCAL | Air Force Metrology and Calibration Program |
| ALT | Accelerated Life Testing |
| ARC | Air Reserve Component |
| APB | Acquisition Program Baseline |
| API | Application Program Interface |
| ASTR | Accelerated Stress Testing and Reliability |
| ATE | Automatic Test Equipment |
| ATML | Automated Test Markup Language |
| BCS | Baseline Comparison System |
| BIST | Built-In Self-Test |
| BIT | Built-In Test |
| BITE | Built-In Test Equipment |
| BIT/FD | Built-In-Test Fault Detection |
| CA | Criticality Analysis |
| CALS | Continuous Acquisition and Life-Cycle Support |
| CBIT | Continuous Built-In Test |
| CBM/CBMA | Condition-Based Maintenance or Condition-Based Monitoring |
| CBM+ | Condition-Based Maintenance Plus (Enhanced by DoD Directives) |
| CCA | Common Cause Analysis / Circuit Card Assembly |
| CDR | Critical Design Review |
| CFE | Contractor Furnished Equipment or Customer Furnished Equipment |
| CFI | Critical Faults Identified |
| CIF | Critical Importance Factor |
| CM | Corrective Maintenance / Condition Monitoring / Configuration Management |
| CMMS | Computer Maintenance Management System |
| CMRS | Calibration and Measurement Requirements Summary |
| CND | Can Not Duplicate |
| CPI | Cost Performance Index |
| COMR | Communications Reliability |
| CONOPS | Concept of Operations |
| COTS | Commercial Off-the-Shelf |
| CPIN | Computer Program Identification Number |
| DO | Operational Dependability |
| DE | Diagnostic Engineering |
| DFD | Design for Diagnosability |
| DFI | Desktop Fault Insertion |
| DFMAT | Design for Manufacturability & Test |
| DFT | Design for Test (some also refer to this as Design for Testability) |
| DFT | Dynamic Fault Tree |
| DIF | Diagnostic Importance Factor |
| DiagML | Diagnostic Modeling Language |
| DISN | Defense Information Switch Network |
| DOC | Designated Operational Capability |
| DoD | United States Department of Defense |
| DPHM | Diagnostics, Prognostics & Health Management |
| DRMP | Design Reference Mission Profile |
| DT&E | Developmental Test and Evaluation |
| ESRT | Essential System Repair Time |
| EC | Enterprise Commander |
| ECN | Engineering Control Number |
| ECP | Engineering Change Proposal |
| ECR | Engineering Change Request |
| ECRB | Engineering Change Review Board |
| ERB | Engineering Review Board |
| ESS | Environmental Stress Screening |
| FA | False Alarm |
| FAP | Functional Area Plan |
| FAR | False Alarm Rate / Federal Aviation Regulation |
| FAT | Functional Acceptance Test / File Allocation Table |
| FD | Fault Detection |
| FD/FI | Fault Detection & Fault Isolation |
| FDI | Fault Detection & Fault Isolation |
| FDR | Final Design Review |
| FHA | Functional Hazard Analysis |
| FI | Fault Isolation |
| FIT | Factory Integration & Test |
| FMC | Fully Mission Capable |
| FFMEA | Functional Failure Mode Effects Analysis |
| FMEA | Failure Mode Effects Analysis |
| FMECA | Failure Mode Effects and Criticality Analysis |
| FMEDA | Failure Mode Effects and Diagnostic Analysis |
| FOM | Figure of Merit |
| FR | Fault Resolution |
| FRACAS | Failure Reporting and Corrective Action System |
| FSA | False System Aborts |
| FSL | Full System List |
| FTA | Fault Tree Analysis |
| FTE | Factory Test Equipment |
| FUI | Failures Uniquely Isolated |
| GFE | Government Furnished Equipment |
| GFP | Government Furnished Property |
| GIDEP | Government-Industry Data Exchange Program |
| HA | Hazard Analysis |
| HALT | Highly Accelerated Life Testing |
| HASS | Highly Accelerated Stress Screen |
| HM | Health Management |
| HRA | Hazardous Risk Analysis |
| IBIT | Initiated Built-In Test |
| ICBM | Intercontinental Ballistic Missile |
| ID | Integrated Diagnostics |
| IETM | Interactive Electronic Technical Manual |
| IFR | In-flight Reliability |
| ILS | Integrated Logistics Support |
| IMPACTS | Integrated Manpower, Personnel, and Comprehensive Training and Safety |
| INCOSE | International Council on Systems Engineering |
| IoT | Internet of Things |
| IRAD | Independent Research and Development |
| IRSP | In-Place Readiness Spares |
| ISDD | Integrated System Diagnostic Design |
| ISHM | Integrated System Health Management |
| ISO | International Standards Organization |
| IT&E | Integration, Test and Evaluation |
| IVHM | Integrated Vehicle Health Management |
| JCALS | Joint Computer-Aided Acquisition and Logistics Support |
| JPA | Job Performance Aid |
| JTAG | Joint Test Action Group |
| KPI | Key Performance Indicator |
| KPM | Key Performance Metric |
| KPP | Key Performance Parameter |
| LCC | Life Cycle Cost |
| LCCA | Life Cycle Cost Analysis |
| LCN | Logistics Control Number |
| LOC | Lines of Code |
| LORA | Level Of Repair Analysis |
| LR | Launch Reliability |
| LRM | Line Replaceable Module |
| LRU | Line Replaceable Unit |
| LSA | Logistics Support Analysis |
| LSAR | LSA Record |
| MAJCO | Major Command |
| MAP | Mission Area Plan |
| MBE | Model Based Engineering |
| MBIT | Maintenance Built-in Test |
| MBR | Model Based Reasoner |
| MBSE | Model Based System Engineering |
| MC | Mission Capable |
| MCMT | Mean Corrective Maintenance Time |
| MCTI | Mean Cost To Isolate |
| MCTR | Mean Cost To Repair / Mean Cost To Replace |
| MDT | Mean Downtime |
| MEFL | Mission Essential Functions List |
| MESL | Minimum-Essential Subsystem List |
| MLH/AH | Maintenance Labor Hours per Active Hour |
| MMH/FH | Maintenance Man-Hours per Flying Hour |
| MMH/LU | Maintenance Man-Hours per Life Unit |
| MMH/PH | Maintenance Man-Hours per Possessed Hours |
| MMT | Mean Maintenance Time |
| MMY/L | Maintenance Man Years per Launch |
| MNS | Mission Needs Statement |
| MP | Mission Profile |
| MP/U | Maintenance Personnel per Operational Unit |
| MOTS | Modified Off-the-Shelf / Modifiable Off-the-Shelf / Military Off-the-Shelf |
| MR | Maintenance Ratio |
| MRS | Mobility Requirements Study |
| MRSP | Mobility Readiness Spares Package |
| MRT | Mean Repair Time |
| MSMT | Mean Scheduled Maintenance Time |
| MTBCF | Mean Time Between Critical Failure |
| MTBDE | Mean Time Between Downing Event |
| MTBF | Mean Time Between Failures |
| MTBFA | Mean Time Between False Alarms |
| MTBM | Mean Time Between Maintenance |
| MTBMA | Mean Time Between Maintenance Actions |
| MTBPM | Mean Time Between Preventative Maintenance |
| MTBSA | Mean Time Between System Aborts |
| MTBR | Mean Time Between Removal |
| MTBUM | Mean Time Between Unscheduled Maintenance |
| MTBSM | Mean Time Between Scheduled Maintenance |
| MTD | Maintenance Training Device |
| MTTF | Mean Time to Failure |
| MTTI | Mean Time to Isolate |
| MTTR | Mean Time to Repair / Mean Time to Replace |
| MTTRF | Mean Time to Restore Function |
| MTTRS | Mean Time to Restore System |
