| A | B |
| Letterhead | Pre-printed Info in Header |
| Dateline | Spell this out! |
| Attention Line (Optional) | 1st line of inside address |
| Inside Address | Name & address of recipient |
| Salutation | Greeting, such as "Dear Mr. X" |
| Subject Line (Optional) | Gives quick overview of topic |
| Message | Letter content or body |
| Complimentary Closing | Says goodbye; often "Sincerely" |
| Company Signature (Optional) | Keyed name of company (CAPS) |
| Writer's Signature Block | Author's name; maybe title |
| Reference Initials | Initials of typist, maybe author |
| Enclosure Notation (Optional) | Says another document included |
| Copy Notation (Optional) | Tells who else received the letter |
| Mixed Punctuation | Salutation: & Comp Close, |
| Open punctuation | No : or , after salutation or comp close |
| Block style format | Lines begin at left margin |
| Modified block style format | Date, Closure Sig Blk from centerpoint |
| Quadruple Space | After date; before Signature Block |
| Personal Business Letter | Sent by an individual |
| Margins | Adjust; at least .5" below letterhead |