M&S Acronyms

Acronym	Meaning
%	percent
®	registered trademark
AFRC	Armstrong Flight Research Center
AHS	The American Helicopter Society International
AIAA	American Institute of Aeronautics and Astronautics
ANSI	American National Standards Institute
ARC	Ames Research Center
ASAP	Aerospace Safety Advisory Panel
ASC	American Standards Committee
ASCE	American Society of Civil Engineers
ASME	American Society of Mechanical Engineers
CA	California
CAD	Computer-Aided Design
CAE	Computer-Aided Engineering
CAM	Computer-Aided Manufacturing
CM	configuration management
COTS	commercial off the shelf
CRM	continuous risk management
DoD	Department of Defense
DOF	degree of freedom
EPA	Environmental Protection Agency
FEM	finite element model
FEMCI	Finite Element Modeling Continuous Improvement
FFRDC	Federally Funded Research and Development Center
GNC	Guidance, Navigation, & Control
GOTS	government off the shelf
GRC	Glenn Research Center
GSFC	Goddard Space Flight Center
GUI	Graphical User Interface
HI	Hawaii
I&T	Integration and Test
I/O	Input/Output
IEC	International Electrotechnical Commission
IEEE	Institute of Electrical and Electronics Engineers
ISO	International Organization for Standardization
ISS	International Space Station
JPL	Jet Propulsion Laboratory
JSC	Johnson Space Center
JWST	James Webb Space Telescope
KSC	Kennedy Space Center

Acronym	Meaning
LaRC	Langley Research Center
M&S	Models and Simulations (See usage note in section 4 of this NASA Technical Handbook.)
M&SCO	Modeling and Simulation Coordination Office
MIL	Military
MOS	Margin of Safety
MOTS	modified off the shelf
MSFC	Marshall Space Flight Center
MSL	Mars Science Laboratory
MUF	Model Uncertainty Factor
NASA	National Aeronautics and Space Administration
NASTRAN	NASA structural analysis system
NCSL	National Conference of Standards Laboratories
NESC	NASA Engineering and Safety Center
NIST	National Institute of Standards and Technology
NM	New Mexico
NPD	NASA Policy Directive
NPR	NASA Procedural Requirements
ODE	ordinary differential equation
OMB	Office of Management and Budget
PDE	partial differential equation
pdf	probability density function
PIRT	Phenomena Identification and Ranking Table
PLD	Programmable Logic Devices
R/r	Requirements or recommendations
Req’t	Requirement
RIDM	risk informed decision making
RWS	Real World System
S/W	Software
SI	System Internationale
SME	Subject Matter Expert
SP	Special Publication
SPIE	The International Society for Optical Engineering
SRQ	System Response Quantities
SSC	Stennis Space Center
STD	Standard
SWE	Software Engineering
V&V	Verification and Validation
VCS	Voluntary Consensus Standards
VV&A	Verification, Validation, and Accreditation
w.r.t.	with respect to