One, the concept of a letter
That letter is shown to someone's identity, experience and other indolent condition and prove an event history, truth special-purpose letter.
In two, the types of letter
From writer to differentiate, can be divided into organizational name certification letter and personally issued a letter. A letter from the use point of view, it can be classified as material is deposited into the file letter, that lost documents such as indolent condition true letter as proof of the use of letters and documents.
Three, the role of letter
Letter to understand and study the relevant personnel and incident true indolent condition, having important certificate, reference.
Four, the structure and writing a letter
A letter generally consists of the title, title, body, end date, signature and several components.