To ensure readers of your documents are able to comprehend what you are saying, it is important that:

• you are consistent in the terms and concepts you use
• if you use acronyms that you provide an explanation the first time they are mentioned.

For example, if you say America, do you mean the United States of America (USA) or the North American sub continent – it may be clear from your point of view but not clear to your readers. It is better to let readers know that you will use USA to refer to the country and North America to the continent.