It depends on the type of abbreviation.
In technology and science, many abbreviations are essential. These include the abbreviations for units of measurement (cm, °C, Hz, ms, and many more), statistical abbreviations (ANOVA, OLS, RMS, N, sd or SD, and so on), and symbols for chemical elements.
In general, you may use these and other common abbreviations without spelling them out on their first occurrence. Well-known abbreviations include common acronyms (such as IT or DVD) and abbreviations of Latin expressions (et al., i.e., etc.).
In contrast, you need to define a new or less-known abbreviation on first mention of a term; then you use the abbreviation instead of the spelled-out term.
By using abbreviations in scientific papers, you write faster, the reader reads faster, and you save space. Read More