3Hyp – Code for the uncommon amino acid 3-hydroxyproline.
4Hyp – Code for the uncommon amino acid 4-hydroxyproline.
4F1G – 4% formaldehyde and 1% gluteraldehyde.
5-FOA – 5-Fluoroacetic acid.

A
A – (1) Adenine or adenosine; (2) One letter code for the amino acid alanine.
A₂₆₀ – Absorbance as measured at 260nm.
aa – aminoacyl
Aad – Three letter code for the uncommon amino acid 3-aminoadipic acid.
Abu – Three letter code for the uncommon amino acid 2-aminobutyric acid.
ac – Acetyl.
Ac – Symbol for the element actinium.
ACD – blood anticoagulant
ADP – Adenosine 5′-diphosphate.
Ade – Three letter code for adenine.
Ado – Three letter code for adenosine.
Ag – Symbol for the element silver.
aHyl – Code for the uncommon amino acid allo-hydroxylysine.
aIle – Code for the uncommon amino acid allo-isoleucine.
Al – Symbol for the element aluminum.
Ala – Three letter code for the amino acid alanine.
Am – Symbol for the element americium.
AMP – Adenosine monophosphate.
an – Anisoyl.
AP – Alkaline phosphatase.
Apm – Three letter code for the uncommon amino acid 3-aminopimelic acid.
Ar – Symbol for the element argon.
Arg – Three letter code for the amino acid arginine.
As – Symbol for the element arsenic.
Asn – Three letter code for the amino acid asparagine.
Asp – Three letter code for the amino acid aspartic acid.
At – Symbol for the element astatine.
ATP – Adenosine 5′-triphosphate.
Au – Symbol for the element gold.

B
B – (1) Symbol for the element boron; (2) One letter code for bromouridine.
Ba – Symbol for the element barium.
BAP – Bacterial alkaline phosphatase.
BCIP – 5-Bromo-4-chloro-3-indoyl phosphate.
Be – Symbol for the element beryllium.
bh – Benzhydryl.
Bh – Symbol for the element bohrium.
Bi – Symbol for the element bismuth.
Bio-dNTP – Biotin-deoxynucleoside triphosphate.
Bk – Symbol for the element berkelium.
bp – Nucleotide base pair.
br – Bromo.
Br – Symbol for the element bromine.
BrUrd – Abbreviation for bromouridine.
BSA – Bovine serum albumin.
B/W – Blue/White cloning.
bz – Benzoyl.
bzl – Benzyl.

C
C – (1) Cytosine or cytidine; (2) One letter code for the amino acid cysteine; (3) Symbol for the element carbon; (4) One letter code for the amino acid cysteine.
Ca – Symbol for the element calcium.
CA – Casamino acids.
Cd – Symbol for the element cadmium.
cDNA – Complementary deoxyribonucleic acid
Ce – Symbol for the element cerium.
Cf – Symbol for the element californium.
Ci – Curie
CIAP – Calf intestinal alkaline phosphatase.
cl – Chloro.
Cl – Symbol for the element chlorine.
Cm – Symbol for the element curium.
Co – Symbol for the element cobalt.
cpm – Counts per minute.
Cr – Symbol for the element chromium.
Cs – Symbol for the element cesium.
CTP – Cytidine 5′-triphosphate.
Cu – Symbol for the element copper.
Cyd – Three letter code for Cytidine
Cys – Three letter code for the amino acid cysteine.
Cyt – Three letter code for cytosine.

D
D – (1) One letter code for the amino acid aspartic acid; (2) One letter code for dihydrouridine.
Da – Dalton.
dAMP – Deoxyadenosine monophosphate.
dATP – Deoxyadenosine triphosphate.
Db – Symbol for the element dubnium (formerly unnipentium).
Dbu – Three letter code for the uncommon amino acid 2,4-diaminobutyric acid.
dCTP – Deoxycytidine triphosphate.
ddATP – Dideoxyadenosine triphosphate.
ddCTP – Dideoxycytidine triphosphate.
ddGTP – Dideoxyguanosine triphosphate.
ddNTP – Dideoxynucleoside triphosphate.
DEPC – Diethyl pyrocarbonate.
DIG – Digoxigenin.
dGTP – Deoxyguanosine triphosphate.
DMSO – Dimethyl sulfoxide.
dmt – Dimethoxytrityl.
DNA – Deoxyribonucleic acid.
DNase – Deoxyribonuclease.
dns – Dansyl.
dNTP – Deoxynucleoside triphosphate.
dpm – Disintegrations per minute.
Dpm – Three letter code for the uncommon amino acid 2,2′-diaminopimelic acid.
Dpr – Three letter code for the uncommon amino acid 2,3-diaminopropionic acid.
ds – Double stranded.
DTT – Dithiothreitol
dTTP – Deoxythymidine triphosphate.
dUTP – Deoxyuridine triphosphate.
Dy – Symbol for the element dysprosium.

E
E – (1) One letter code for the amino acid glutamic acid; (2) abbreviation for ethyl.
EDTA – Ethylene diamine tetraacetic acid.
EGTA – Ethylene glycol tetracetic acid.
ELISA – Enzyme linked immunosorbent assay.
EMBL – European Molecular Biology Laboratory
ENDO – Endodeoxyribonuclease assay.
Er – Symbol for the element erbium.
Es – Symbol for the element einsteinium.
Eu – Symbol for the element europium.
exo – Exonuclease.
EXO – 5′ and 3′ exodeoxyribonuclease assay.

F
F – (1) Symbol for the element fluorine; (2) One letter symbol for the amino acid phenylalanine (3) formyl.
fa – Formylaminoacyl.
Fe – Symbol for the element iron.
fl – Fluoro.
Fm – Symbol for the element fermium.
FOA – 5-Fluoroacetic acid.
Fr – Symbol for the element francium.

G
G – (1) Guanine or Guanosine; (2) One letter code for the amino acid glycine.
Ga – Symbol for the element gallium.
Gal – D-galactose.
Gd – Symbol for the element gadolinium.
Ge – Symbol for the element germanium.
Gln – Three letter code for the amino acid glutamine.
Glu – Three letter code for the amino acid glutamic acid.
Gly – Three letter code for the amino acid glycine.
GTGB – Glycerol tolerant gel buffer.
Gua – Three letter code for guanine.
Guo – Three letter code for guanosine.
GUS – Beta-D-glucuronidase.

H
H – (1) Symbol for the element hydrogen; (2) One letter code for the amino acid histidine; (3) dihydro.
HBSS – Hank’s Buffered Salt Solution.
He – Symbol for the element helium.
HEPES – N-(2-hydroxyethyl)piperazine-N’-(2-ethanesulfonic acid).
Hf – Symbol for the element hafnium.
Hg – Symbol for the element mercury.
His – Three letter code for the amino acid histidine.
hm – Hydroxymethyl.
ho – Hydroxy.
Ho – Symbol for the element holmium.
HRP – Horseradish peroxidase.
HPLC – High performance liquid chromatography.
Hs – Symbol for the element hassium.
hU – Symbol for dihydrouridine.
Hyl – Three letter code for the uncommon amino acid hydroxylysine.
Hyp – Three letter code for hypoxanthine.

I
I – (1) Symbol for the element iodine; (2) One letter code for the amino acid isoleucine; (3) One letter code for inosine; (4) Isopentenyl.
IEF – Isoelectric focusing.
Ile – Three letter code for the amino acid isoleucine.
In – Symbol for the element indium.
Ino – Three letter code for inosine.
io – Iodo.
IPTG – Isopropyl-beta-D-thiogalactopyranoside.
Ir – Symbol for the element iridium.

K
K – (1) Symbol for the element potassium; (2) One letter code for the amino acid lysine.
kb – Kilobase.
kDa – KiloDalton.
Kr – Symbol for the element krypton.

L
L – One letter code for the amino acid leucine.
La – Symbol for the element lanthanum.
LB – Luria Bertani media.
Leu – Three letter code for the amino acid leucine.
Li – Symbol for the element lithium.
Lr – Symbol for the element lawrencium.
Lu – Symbol for the element lutetium.
Lys – Three letter code for the amino acid lysine.

M
M – (1) One letter code for the amino acid methionine; (2) One letter code for thioinosine; (3) Methyl.
MCS – Multiple cloning site.
Md – Symbol for the element mendelevium.
MeGly – Code for the uncommon amino acid N-methylglycine.
Met – Three letter code for the amino acid methionine.
Mg – Symbol for the element magnesium.
MMLV – Moloney murine leukemia virus.
mmt – Monomethoxytrityl.
Mn – Symbol for the element manganese.
Mo – Symbol for the element molybdenum.
MOPS – 3-(N-morpholino)propanesulfonic acid.
mRNA – Messenger ribonucleic acid.
Mt – Symbol for the element meitnerium.
MW – Molecular weight.

N
N – (1) Nucleotide or nucleoside; (2) Symbol for the element nitrogen; (3) One letter code for the amino acid asparagine.
Na – Symbol for the element sodium.
NAD – Nicotinamide adenine dinucleotide.
NADH – Reduced form of nicotinamide adenine dinucleotide.
NADP – Nicotinamide adenine dinucleotide phosphate.
NADPH – Reduced form of nicotinamide adenine dinucleotide phophate.
Nb – Symbol for the element niobium.
NBT – Nitro blue tetrazolium.
Nd – Symbol for the element neodymium.
Ne – Symbol for the element neon.
Ni – Symbol for the element nickel.
Nle – Three letter code for the uncommon amino acid norisoleucine.
No – Symbol for the element nobelium.
Np – Symbol for the element neptunium.
NP-40 – Nonidet P-40.
nt – Nucleotide.
NTP – Nucleoside triphosphate.
Nuc – Three letter code for nucleotide or nucleoside.
Nva – Three letter code for the uncommon amino acid norvaline.
NZCYM – NZ amine, NaCl, bacto-yeast extract, casamino acids, and magnesium sulfate.
NZM – NZ amine, NaCl, and magnesium sulfate.
NZYM – NZ amine, NaCl, bacto-yeast extract, and magnesium sulfate.

O
O – (1) Symbol for the element oxygen; (2) One letter code for orotidine.
oh – Hydroxy.
oilgo(dT) – Oligodeoxythymidylic acid.
OMP – Orotidine monophosphate.
Ord – Three letter code for orotidine.
Orn – Three letter code for the uncommon amino acid ornithine.
Oro – Three letter code for orotate.
Os – Symbol for the element osmium.

P
P – (1) Symbol for the element phosphorus; (2) One letter code for the amino acid proline.
Pa – Symbol for the element protoactinium.
Pb – Symbol for the element lead.
PBMC – Peripheral blood mononuclear cells.
Pd – Symbol for the element palladium.
PAGE – Polyacrylamide gel electrophoresis.
PBS – Phosphate buffered saline.
PCR – Polymerase chain reaction.
PEI – Polyethylenimine.
PEG – Polyethylene glycol.
Phe – Three letter code for the amino acid phenylalanine
P_i – Inorganic phosphate.
PIPES – Piperazine-N,N’-bis(2-ethanesulfonic acid).
Pm – Symbol for the element promethium.
Po – Symbol for the element polonium.
Pr – Symbol for the element praseodymium.
Pro – Three letter symbol for the amino acid proline.
Pt – Symbol for the element platinum.
PNK – Polynucleotide kinase.
poly(A) – Polyadenylic acid.
poly(A)⁺ – Polyadenylated (mRNA).
poly(dA-dT) – Poly (deoxyadenlic acid – deoxythymidylic acid).
poly(dT) – Polydeoxythymidylic acid.
Pu – Symbol for the element plutonium.
Puo – Thee letter code for purine nucleoside.
Pur – Three letter code for purine.
Pyd – Thee letter code for pyrimidine nucleoside.
Pyr – Three letter code for pyrimidine.

Q
Q – One letter code for the amino acid glutamine.

R
R – (1) One letter code for the amino acid arginine; (2) One letter code for a purine nucleoside or nucleotide.
Ra – Symbol for the element radium.
RBC – Red blood cell.
Rb – Symbol for the element rubidium.
Re – Symbol for the element rhenium.
Rf – Symbol for the element rutherfordium (formerly unniquadium).
Rh – Symbol for the element rhodium.
Rn – Symbol for the element radon.
RNA – Ribonucleic acid.
RNAse – Ribonuclease.
rRNA – Ribosomal ribonucleic acid.
RT – Reverse transcriptase.
Ru – Symbol for the element ruthenium.

S
S – (1) Symbol for the element sulfur; (2) One letter code for the amino acid serine; (3) One letter code for thiouridine; (4) Thio or Mercapto.
Sar – Three letter code for the uncommon amino acid sarcosine.
Sb – Symbol for the element antimony.
Sc – Symbol for the element scandium.
SDS – Sodium dodecyl sulfate.
Se – Symbol for the element selenium.
Ser – Three letter code for the amino acid serine.
Sg – Symbol for the element seaborgium.
Shyp – Abbreviation for mercaptopurine.
Si – Symbol for the element silicon.
SIno – Abbreviation for for thioinosine.
Sm – Symbol for the element samarium.
Sn – Symbol for the element tin.
Sno – Three letter code for thioinosine.
Sr – Symbol for the element strontium.
Srd – Three letter code for thiouridine.
ss – Single stranded.
SSC – Sodium chloride/sodium citrate buffer.
SSPE – Sodium chloride/sodium phosphate/EDTA buffer.
SU – Two letter code for thiouridine.
Sur – Three letter code for thiouracil.
SUra – Abbreviation for thiouracil.
Syp – Three letter code for mercaptopurine.

T
T – (1) Thymine or thymidine; (2) One letter code for the amino acid threonine; (3) One letter code for ribothymidine.
Ta – Symbol for the element tantalum.
TAE – Tris/acetate/EDTA buffer.
Tb – Symbol for the element terbium.
TBE – Tris/borate/EDTA buffer.
TBS (1X) – Tris buffered saline.
TBST – Tris buffered saline with tween-20.
Tc – Symbol for the element technietium.
TdT – Terminal deoxynucleotidyl transferase.
Te – Symbol for the element tellurium.
TE – Tris/EDTA buffer.
TEMED – N’,N’,N’,N’-Tetramethylethylenediamine.
TES – (1) N-Tris(hydroxymethyl)methyl-2-aminoethanesulfonic acid; (2) Tris, EDTA, and sodium chloride.
TGB – Tris glycine buffer.
Th – Symbol for the element thorium.
Thd – Three letter code for ribothymidine.
thp – Tetrahydropyranyl.
Thr – Three letter code for the amino acid threonine.
Thy – Three letter code for thymine.
Tl – Symbol for the element thalium.
Ti – Symbol for the element titanium.
TLC – Thin layer chromotography.
T_m – Melting temperature.
Tm – Symbol for the element thulium.
TMB – 3,3′,5,5′-Tetramethylbenzidine.
TNE – Tris and NaEDTA.
tos – Tosyl.
TPE – Tris/phosphate/EDTA buffer.
tr – Trityl.
TRICINE – N-Tris(hydroxymethyl)methylglycine.
Tris – Tris(hydroxymethyl)aminomethane.
Trp – Three letter code for the amino acid tryptophan.
tRNA – Transfer ribonucleic acid.
TSY – Trypticase soy yeast.
Tyr – Three letter code for the amino acid tyrosine.

U
U – (1) Uracil or uridine; (2) Symbol for the element uranium.
Ura – Three letter code for uracil.
Urd – Three letter code for uridine.
UTP – Uridine triphosphate.
Uub – Symbol for the element ununbium.
Uun – Symbol for the element ununnilium.
Uuu – Symbol for the element unununium.
UV – Ultraviolet.

V
V – (1) Symbol for the element vanadium; (2) One letter code for the amino acid valine.
Val – Three letter code for the amino acid valine.
v/v - volume/volume

W
W – (1) Symbol for the element tungsten; (2) One letter code for the amino acid tryptophan.
w/v – weight/volume

X
X – One letter code for unkown or other uncommon amino acid.
X-Gal – 5-bromo-4-chloro-3-indoyl-beta-D-galactopyranoside.
X-Gluc – 5-bromo-4-chloro-3-indoyl-beta-D-glucuronic acid.
Xan – Three letter code for xanthine.
Xe – Symbol for the element xenon.

Y
Y – (1) Symbol for the element yttrium; (2) One letter code for the amino acid tyrosine; (3) One letter code for a pyrimidine nucleoside or nucleotide.
Yb – Symbol for the element ytterbium.
YMG – Yeast and malt extract with glucose.
YPD Media – Yeast extract/peptone/dextrose.
YPG Media – Yeast extract/peptone/galactose.
YT Media – Yeast extract/tryptone.

Z
Zn – Symbol for the element zinc.
Zr – Symbol for the element zirconium.

EUP    Enterprise Unified Process

FAQ    Frequently Asked Questions
FIFO    First In, First Out

FLOPS    Floating Point Operations Per Second

GIGO    Garbage In, Garbage Out
GIS    Geographic Information Systems
GPS    Global Positioning System

HDTV    High Definition Televsion
HDV    High-Definition Video

HFS    Hierarchical File System

X, Y, Z
XML: eXtensible Markup Language
YMCA: Young Men’s Christian Association
YWCA: Young Women’s Christian Association

PAC: Political Affairs Committee; Public Accounts Committee
PACER: Programme for Acceleration of Commercial Energy Research
PAN: Permanent Account Number (of Income-Tax)
PATA: Pacific-Asia Travel Association
PCS: Public Civil Service; Punjab Civil Service
PIB: Press Information Bureau
Pin Code: Postal Index Number Code
PIO: Persons of Indian Origin
PLF: Plant Load Factor
PM: Post Meridiem; after-noon; also Postmaster; Prime Minister; post-mortem (after death)
PMG: Postmaster General
PN: Participatory Note
PO: Post Office; Postal Order
POPs: Persistent Organic Pollutants; Point of Purchase
POTA: Prevention of Terrorism Act
POW: Prisoner of War
PP: Public Prosecutor; Particular Person
PRO: Public Relations Officer
PS: Post Scriptum; Post Script; written after
PSC: Public Service Commission
PSE: Public Sector Enterprises
PSLV: Polar Satellite Launch Vehicle
PTA: Preferential Trade Area
PTI: Press Trust of India
PTO: Please Turn Over; Privilege Ticket Order
PUFA: Poly Unsaturated Fatty Acids
PVC: Param Vir Chakra
PVSM: Param Vishisht Sewa Medal
PWD: Public Works Department

O
OAS: Organisation of American States
OAU: Organisation of African Unity
OBC: Other Backward Communities
OBU: Offshore Banking Unit
ODA: Official Development Assistance
ODF: Open Document Format
ODS: Ozone Depletion Substances
OECD: Organisation of Economic Co-operation and Development
OGL: Open General Licence
OIC: Organisation of Islamic Countries
OIGS: On India Government Service
OIL: Oil India Limited
OM: Order of Merit
ONGC: Oil and Natural Gas Commission
OPEC: Organisation of Petroleum Exporting Countries
OSCE: Organisation for Security and Cooperation in Europe
OSD: Officer on Special Duty
OXML: Open Extended Marking Language

N
NAA: National Airport Authority
NABARD: National Bank for Agriculture and Rural Development. (It helps rural development by providing re-finance facility).
NACIL: National Aviation Company of India Ltd
NADA: National Anti-Doping Agency
NAEP: National Adult Education Programme
NAFTA: North America Free Trade Agreement
NAG: National Air Guard
NAM: Non-aligned Movement
NAMA: Non-Agriculture Market Access
NASA: National Aeronautics and Space Administration (of the U.S.A.)
NASDAQ: National Association of Securities Dealers Automated Quotation
NATA: Natural Aptitude Test for Architecture
NATO: North Atlantic Treaty Organisation
NAV: Net Asset Value
NB: Nota bene; note well, or take notice
NCA: Nuclear Command Authority
NCC: National Cadet Corps
NCEP: National Committee on Environmental Planning
NCERT: National Council of Education Research and Training
NCR: National Capital Region
NDA: National Defence Academy; National Democratic Alliance
NDNC: National Do Not Call (Registry)
NDPS: Narcotic Drugs & Psychotropic Substances
NDRF: National Disaster Response Force
NDTL: National Dope Testing Laboratory
NeGP: National e-governance Plan
NEDB: North-Eastern Development Bank
NEP: National Education Policy
NEPA: National Environment Protection Authority
NFO: New Fund Offers
NHDP: National Highways Development Project
NHRC: National Human Rights Commission
NIC: National Integration Council
NIFT: National Institute of Fashion Technology
NIO: National Institute of Oceanography
NIS: National Institute of Sports
NIT: National Institute of Technology
NLMA: National Literacy Mission Authority
NMD: Nuclear Missile Defence
NMDC: National Mineral Development Corporation
NPL: National Physical Laboratory
NPR: National Population Register
NPT: (Nuclear) Non-Proliferation Treaty
NRBI: National Rural Bank of India
NREGA: National Rural Employment Guarantee Act
NREP: National Rural Employment Programme
NRF: National Renewal Fund
NRI: Non-Resident Indian
NRR: National Reproduction Rate
NRSA: National Remote Sensing Agency
NSA: National Security Act
NSC: National Service Corps; National Security Council
NSDL: National Securities Depository Limited
NSE: National Stock Exchange
NSR: National Skills Registry
NTPC: National Thermal Power Corporation
NWDA: National Water Development Agency
NWRC: National Water Resources Council

M
MAT: Minimum Alternative Tax
MER: Mars Exploration Rover
MBBS: Bachelor of Medicine and Bachelor of Surgery
MCF: Master Control Facility
MEP: Minimum Export Price
MES: Military Engineering Service
METSAT: Meteorological Satellite
MFA: Multi-Fibre Agreement
MFN: Most Favoured Nation
MIP: Moon Impact Probe
MMS: Multimedia Messaging Service
MMTC: Minerals and Metals Trading Corporation of India
MNC: Multi-national Corporation
MNIC: Multi-purpose National Identity Card
MODEM: Modulator-Demodulator
MRI: Magnetic Resonance Imaging
MRTPC: Monopolies and Restrictive Trade Practices Commission
MRTS: Mass Rapid Transit System
MSA: Maritime Safety Agency
MSCF: Maritime Security Cooperation Framework
Mss: Manuscript
MTCR: Missile Technology Control Regime
MTO: Multilateral Trade Organisation
MVC: Maha Vir Chakra
MUNO: Maha Vir Chakra

JCO: Junior Commissioned Officer

JTO:Junior Telecom Officer

JNNURM: Jawahar Lal Nehru National Urban Renewal Mission
JPC: Joint Parliamentary Committee
JPEG: Joint Photographic Experts Group
JWG: Joint Working Group
KG: Kindergarten
Kg: Kilogramme
KPO: Knowledge Process Outsourcing
LAC: Line of Actual Control
LCA: Light Combat Aircraft
LDC: Least Developed Countries
LHC: Large Hadron Collider
LIC: Life Insurance Corporation (of India)
LLP: Limited Liability Partnership
LOAC: Line of Actual Control
LTA: Light Transport Aircraft
LTTE: Liberation Tigers of Tamil Eelam

B
BARC: Bhabha Atomic Research Centre
BBC: British Broadcasting Corporation
BC: Before Christ; Board of Control; British Columbia; Battery Commander
BCG: Bacillus Calmette Guerin—Anti-Tuberculosis Vaccine
BICP: Bureau of Industrial Costs and Prices
BIFR: Board of Industrial and Financial Reconstruction
BIOS: Basic Input Output System
BKU: Bharatiya Kisan Union
BMD: Ballistic Missile Defence System
BOLT: BSE On-Line Trading (System)
BOSS: Bharat Operating System Solutions
BPO: Business Process Outsourcing
BPR: Bottom Pressure Records
BRO: Border Road Organisation
BSE: Bombay Stock Exchange
BSF: Border Security Force
BSNL: Bharat Sanchar Nigam Ltd

A
ABM: Anti Ballistic Missiles
ABVP: Akhil Bharatiya Vidyarthi Parishad
AC: Alternating Current; Ashoka Chakra
ACU: Asian Currency Union
AD: anno Domini; in the year of Lord Christ
ADB: Asian Development Bank
ADC: Aide-de-Camp; Access Deficit Charge
ADF: Asian Development Fund
ADS: Air Defence Ship
AJT: Advanced Jet Trainer
AG: Accountant General; Adjutant General
AI: Air India
AIDS: Acquired Immune Deficiency Syndrome
AIIMS: All India Institute of Medical Sciences
AIR: All India Radio; Annual Information Report
AITUC: All India Trade Union Congress
AJT: Advanced Jet Trainer
ALH: Advanced Light Helicopter
AM: ante meridiem; before noon
AMC: Army Medical Corps; Asset Management Companies
AME: Associate Member of the Institute of Engineers
APC: Agricultural Prices Commission
APEC: Asia-Pacific Economic Cooperation
APPLE: Ariane Passenger Payload Experiment
APPU: Asian Pacific Postal Union
ARC: Asset Reconstruction Company
ARDR: Agricultural and Rural Debt Relief
ASAT: Anti-Satellite weapon
ASC: Army Service Corps
ASCI: Advanced Strategic Computing Initiative
ASCII: American Standard Code for Information
ASEAN: Association of South-East Asian Nations
ASEM: Asia-Europe Meeting
ASIMO: Advanced Step in Innovative Mobility
ASLV: Augmented Satellite Launch Vehicle
ASMA: Antarctica Specially Managed Area
ASSOCHAM: Associated Chambers of Commerce and Industry
ATA: Air Time Authority; Allen Telescope Array
ATC: Air Traffic Controller
ATM: Automatic Teller Machine
ATR: Action Taken Report
ATV: Automatic Transfer Vehicle
AUM: Assets Under Management
AVC: Army Veterinary Corps
AVM: Additional Volatility Margin
AWACS: Airborne Warning and Control System