Use acronyms and abbreviations sparingly. In your documentation, you can introduce acronyms for terms that you intend to repeat frequently. If the acronym is not familiar to your audience, spell it out at the first instance.

You can use well-known abbreviations for country names. For example, US and UK. Do not use periods or spaces when writing US and UK.

Use the acronym or abbreviation instead of the full form if it is more familiar to your audience. For example, do not spell out PDF.