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List of Common Abbreviations

An abbreviation is a shortened form of a word or phrase. It can take various forms including acronyms, initialisms, and truncations. Abbreviations help us communicate more efficiently by reducing the length of commonly used terms while maintaining understanding. This page provides a comprehensive list of abbreviations used in everyday language, business, science, technology, and various professional fields.

Types of Abbreviations

Abbreviations can be classified into several categories:

Acronyms: Formed from the initial letters of words and pronounced as a word (e.g., NASA, UNESCO)
Initialisms: Formed from initial letters but pronounced letter by letter (e.g., FBI, ATM)
Shortenings: A shortened version of a longer word (e.g., lab, gym)
Contractions: Words formed by omitting letters from the middle (e.g., Dr, Mrs)

Everyday Abbreviations

A.M. - Ante Meridiem (before noon)

P.M. - Post Meridiem (after noon)

B.C. - Before Christ

A.D. - Anno Domini

i.e. - That is

e.g. - For example

etc. - Et cetera (and so on)

vs. - Versus

approx. - Approximately

dept. - Department

min. - Minimum/Minute

max. - Maximum

avg. - Average

no. - Number

pt. - Point/Part

Measurement Abbreviations

cm - Centimeter

mm - Millimeter

km - Kilometer

mg - Milligram

kg - Kilogram

ml - Milliliter

L - Liter

ft - Foot/Feet

in - Inch

lb - Pound

oz - Ounce

mph - Miles per hour

kph - Kilometers per hour

psi - Pounds per square inch

F - Fahrenheit

C - Celsius

sq ft - Square feet

cu ft - Cubic feet

W - Watt

kW - Kilowatt

Time Abbreviations

sec - Second

min - Minute

hr - Hour

wk - Week

mo - Month

yr - Year

BCE - Before Common Era

CE - Common Era

EST - Eastern Standard Time

PST - Pacific Standard Time

GMT - Greenwich Mean Time

UTC - Coordinated Universal Time

Business Abbreviations

CEO - Chief Executive Officer

CFO - Chief Financial Officer

CTO - Chief Technology Officer

COO - Chief Operating Officer

HR - Human Resources

PR - Public Relations

ROI - Return on Investment

KPI - Key Performance Indicator

B2B - Business to Business

B2C - Business to Consumer

SME - Small and Medium-sized Enterprise

R&D - Research and Development

EOD - End of Day

ETA - Estimated Time of Arrival

P&L - Profit and Loss

MOU - Memorandum of Understanding

Medical Abbreviations

BP - Blood Pressure

HR - Heart Rate

ER - Emergency Room

ICU - Intensive Care Unit

MRI - Magnetic Resonance Imaging

CT - Computed Tomography

ED - Erectile Dysfunction

HIV - Human Immunodeficiency Virus

AIDS - Acquired Immunodeficiency Syndrome

OTC - Over-the-Counter

Rx - Prescription

BMI - Body Mass Index

DNA - Deoxyribonucleic Acid

RNA - Ribonucleic Acid

CPR - Cardiopulmonary Resuscitation

Technology and Internet Abbreviations

WWW - World Wide Web

HTML - HyperText Markup Language

HTTP - HyperText Transfer Protocol

HTTPS - HyperText Transfer Protocol Secure

URL - Uniform Resource Locator

IP - Internet Protocol

Wi-Fi - Wireless Fidelity

SEO - Search Engine Optimization

SaaS - Software as a Service

PaaS - Platform as a Service

IaaS - Infrastructure as a Service

API - Application Programming Interface

UX - User Experience

UI - User Interface

IoT - Internet of Things

AI - Artificial Intelligence

VR - Virtual Reality

AR - Augmented Reality

QA - Quality Assurance

Academic and Educational Abbreviations

PhD - Doctor of Philosophy

MA - Master of Arts

MSc - Master of Science

BA - Bachelor of Arts

BSc - Bachelor of Science

GPA - Grade Point Average

SAT - Scholastic Assessment Test

GRE - Graduate Record Examination

MBA - Master of Business Administration

JD - Juris Doctor

MD - Doctor of Medicine

EdD - Doctor of Education

STEM - Science, Technology, Engineering, Mathematics

IB - International Baccalaureate

AP - Advanced Placement

Government and Political Abbreviations

POTUS - President of the United States

SCOTUS - Supreme Court of the United States

VP - Vice President

GOP - Grand Old Party (Republican Party)

DNC - Democratic National Committee

UN - United Nations

EU - European Union

NATO - North Atlantic Treaty Organization

GDP - Gross Domestic Product

GNP - Gross National Product

CIA - Central Intelligence Agency

FBI - Federal Bureau of Investigation

DOJ - Department of Justice

EPA - Environmental Protection Agency

FDA - Food and Drug Administration

NASA - National Aeronautics and Space Administration

DHS - Department of Homeland Security

IRS - Internal Revenue Service

CDC - Centers for Disease Control and Prevention

Texting and Social Media Abbreviations

LOL - Laugh Out Loud

OMG - Oh My God

BTW - By The Way

IMO - In My Opinion

IDK - I Don't Know

TMI - Too Much Information

BRB - Be Right Back

AFK - Away From Keyboard

FYI - For Your Information

DIY - Do It Yourself

SMH - Shaking My Head

YMMV - Your Mileage May Vary

DM - Direct Message

PM - Private Message

IMO/IMHO - In My (Humble) Opinion

TL;DR - Too Long; Didn't Read

JK - Just Kidding

FOMO - Fear Of Missing Out

TYSM - Thank You So Much

GOAT - Greatest of All Time

AMA - Ask Me Anything

Conclusion

Abbreviations continue to evolve with our changing communication methods. New abbreviations emerge in social media and texting contexts, while professional fields maintain their specialized terminology. Understanding these common abbreviations helps facilitate clearer and more efficient communication across various contexts. When using abbreviations in formal writing, it's important to consider your audience and spell out the full term on first use, followed by the abbreviation in parentheses for subsequent references.

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Reference Files For List Of Abbreviations

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