Abbreviations - Google Play

Abbreviations is a clear, carefully checked guide to English abbreviations: what they mean, how to write them and when to use them. Every entry gives the abbreviation, its full form and a short note on usage, and long lists have a filter box so you can find any entry in seconds.

What the app covers

• How Abbreviations Work: abbreviations, acronyms and initialisms; periods in American and British style (Mr. or Mr, U.S. or US, Ph.D. or PhD); plurals and possessives; a or an before abbreviations; when to spell out and how to use capitals
• People, Titles and Ranks: Mr, Mrs, Ms, Mx, Dr and other titles; academic degrees; professional letters and British honours; official rank abbreviations of the US Army, Marine Corps, Navy and Air Force, the British Army, Royal Navy and Royal Air Force; police ranks in England and Wales and the US
• Places and Addresses: all USPS state and territory codes, Canada Post province and territory codes, ISO 3166 country codes, and street and map terms
• Dates and Time: days and months, date formats and ISO 8601, AD, BC, CE and BCE, a.m. and p.m., noon and midnight, UTC, GMT and time zone abbreviations with their correct offsets
• Units and Symbols: why SI unit symbols are not abbreviations, the SI base and derived units, all SI prefixes from quecto to quetta, and US customary units with exact conversions
• Latin Abbreviations: e.g., i.e., etc., et al., cf., viz., N.B., P.S. and more, plus the Latin of references and law
• Business and Technology: Inc., Ltd., LLC and PLC; CEO, CFO and other job titles; ROI, KPI, EBITDA and ISO currency codes; office and email terms such as ASAP, FYI, EOD and RSVP; computer, internet and file format terms
• Science and Medicine: DNA, pH, UV and other science terms, how to shorten scientific names (E. coli, sp., spp.), and common medical abbreviations
• Everyday and Online: common everyday short forms, texting and chat abbreviations, and international organizations such as the UN, WHO, NATO and the EU
• Mistakes and Practice: the most common errors, and 20 practice questions with answers

Made for learning
• Original explanations in clear, simple English
• American and British conventions explained side by side
• Official codes from USPS, Canada Post and ISO, and unit rules from the SI Brochure
• Simple diagrams of the kinds of abbreviation, the 12-hour and 24-hour clock, and world time zones
• Filter boxes on long lists, and search across the whole app
• Dark mode
• Works offline, with no account needed
• Explanations in 8 languages: English, Español, Português, Français, Deutsch, العربية, हिन्दी and Bahasa Indonesia (the English stays English)

Useful for students, English learners, writers, editors and office workers who want to read and write abbreviations correctly.

This app is an independent study aid. It is not affiliated with any style guide publisher, postal service, standards body or government.