Abbreviations

Discover a comprehensive list of common abbreviations in English with this detailed guide. Perfect for students, professionals, and language learners, this article explains how abbreviations are formed, how to use them correctly, and provides categorized lists with clear meanings and examples.

What Are Abbreviations?

In both formal and informal English, we often shorten words or phrases instead of writing them in full. For example, it is common to see etc. or e.g. in academic writing, while abbreviations such as OMG or FYI frequently appear in text messages.

Although abbreviations may seem like a modern invention driven by technology and text messaging, they have existed for thousands of years. In ancient Greece and Rome, writers regularly shortened words using their initial letters. English has used abbreviations since its earliest records—Beowulf, an Old English epic poem from around the 10th century, already contained abbreviated word forms.

Why Do We Use Abbreviations?

The reason abbreviations were popular hundreds of years ago and remain popular today is simple: they save time and space. Writing SARS is far more efficient than writing Severe Acute Respiratory Syndrome every time.

In the modern world, character limits also encourage abbreviation. For example, social media platforms such as Twitter restrict posts to 280 characters, making shortened forms extremely useful.

Abbreviations can be created in several ways:

• Using the first letter or letters: v. (verb), Co. (company)
• Keeping key letters: Ltd. (limited), Revd. (Reverend)
• Using first and last letters: Dr. (Doctor), Rd. (Road)
• Using initial letters of phrases: BTW (by the way), RSVP (répondez s’il vous plaît)

Many modern abbreviations developed with text messaging, such as TMI (too much information). Numbers may also replace sounds, for example L8r (later).

Common Abbreviations

International Organizations

• UN – United Nations
• WHO – World Health Organization
• EU – European Union
• WTO – World Trade Organization
• NASA – National Aeronautics and Space Administration

Company Names

Types of Abbreviations

Acronyms

Acronyms are abbreviations pronounced as words.

• NATO – North Atlantic Treaty Organization
• NASA – National Aeronautics and Space Administration
• AIDS – Acquired Immune Deficiency Syndrome

Initialisms

Initialisms are pronounced letter by letter.

• FBI – Federal Bureau of Investigation
• ATM – Automated Teller Machine
• BBC – British Broadcasting Corporation

Latin abbreviations are also common in writing:

• e.g. (exempli gratia) – for example
• i.e. (id est) – that is / in other words

Abbreviation Usage in Different Contexts

Time

• AM – ante meridiem (before noon)
• PM – post meridiem (after noon)
• BC – Before Christ
• AD – Anno Domini (in the year of our Lord)

Space & Direction

• km – kilometer
• N / S / E / W – north, south, east, west

Abbreviations List

Business & Finance

• Ltd. – Limited
• Inc. – Incorporated
• LLC – Limited Liability Company
• WFH – Work From Home
• FTE – Full-Time Employee

Marketing & Sales

• B2B – Business to Business
• B2C – Business to Consumer
• SEO – Search Engine Optimization
• CTR – Click-Through Rate
• SWOT – Strength, Weakness, Opportunity, Threat

Medical Abbreviations

• BP – Blood Pressure
• ICU – Intensive Care Unit
• ECT – Electroconvulsive Therapy
• SOB – Shortness of Breath

Title Abbreviations

• P – President
• VP – Vice President
• CEO – Chief Executive Officer
• CFO – Chief Financial Officer
• Dr. – Doctor

Note-Taking Abbreviations

• etc. – and so on
• e.g. – for example
• i.e. – that is
• w/ – with
• w/o – without

Internet Acronyms & Text Slang

Note: The following terms are informal and may include strong language. Avoid using them in professional contexts.

• BRB – Be Right Back
• SMH – Shaking My Head
• IDK – I Don’t Know
• TBH – To Be Honest
• NSFW – Not Safe For Work

Common Abbreviations Infographic

IPA Pronunciation (US)