Abbreviations are shortened forms of words or phrases. They are typically used to save time and space, or to make a long phrase easier to remember. Abbreviations can be made up of letters (such as “USA” for “United States of America”), numbers (such as “2” for “to” or “4” for “for”), or a combination of both. Abbreviations are commonly used in many different contexts, including business, government, education, and even everyday life. In the corporate world, abbreviations have become ubiquitous in emails and other forms of communication. In the medical field, abbreviations are often used to save time in documenting patient care. In education, abbreviations are widely used in textbooks and research papers to refer to sources quickly and concisely. One type of abbreviation that is widely used is acronyms – words formed using the first letter of each word in a phrase. For example, WHO stands for World Health Organisation; PAHO stands for Pan American Health Organisation; WIPO stands for World Intellectual Property Organisation; ATM stands for Automated Teller Machine; DVD stands for Digital Versatile Disc; etc. Acronyms can also be formed using numbers instead of letters – such as 3G (third-generation mobile network) or 4K (a resolution format for digital video). In addition to acronyms, there are many other types of common abbreviations that can be seen on a daily basis such as ASAP (as soon as possible) or FYI (for your information). The use of abbreviations can help make communication faster and easier by saving time on typing out full words or phrases.