Memo

To: Heady the Head Honcho, Andy Adler
From: Darcy Darko
Date: June 15, 2009
Re: Update on the T-12 Phase Three testing
As we enter Phase Four of the T-12 testing, I wanted to provide a progress overview of the Phase Three testing.
The body of the memo might include two-four paragraphs outlining the purpose of the memo. If this is a longer memo, each paragraph will have a subhead to help guide the reader through the document.
Finally, the writer includes a summary paragraph, which features bullets highlighting the main points of each previous paragraph, and concludes the memo with a stated action required by the reader or writer.
A quick note about the use of "memo" vs. "memorandum:" it doesn't really matter. It falls in line with the style selected by the writer.