Most acronyms are formed from the first or first few letters of a series of words. They are written in capital letters and do not take points.


If an acronym contains six or more letters, capitalise the initial letter and lowercase the others.

Small_OK Erasmus
Small_OK Europol
Small_OK Unctad

On the other hand, initialisms are usually formed from just the first letters of a series of words. Generally speaking, write them following the upper or lower case pattern of the full term. When the full term is in lower case, they are usually separated by points.

Small_OK ECTS (European Credit Transfer and Accumulation System)
Small_OK e.g. (exempli gratia)
Small_OK i.e. (id est)

Note, however, that the abbreviation plc (public limited company) is always written in lower case but without points.

In higher education, some initialisms representing degree studies combine upper and lower case and do not take points.

Small_OK BSc (Bachelor of Science)
Small_OK PhD (philosophiae doctor)

Note, too, that an initialism may take capital letters even when the full term does not.

Small_OK NGO (non-governmentalorganisation)
Small_OK PC (personal computer)

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