| A | B |
| Block letter style | A business letter format where all parts of the letter begin at the left margin. |
| Complimentary close | The part of a business letter that contains a formal closing. |
| Electronic mail (e-mail) | The electronic transfer of messages among users of a computer network. |
| Enclosure notation | The part of a business letter that seves as a reminder that there is something in the envelope in addition to the letter itself. |
| Letter address | The part of a business letter that contains the name and address of the recipient of the letter. |
| Letterhead | Business stationery with the company name and address printed at the top. |
| Mixed punctuation | A special format for a businessw letter that places a colon after the salutation and a comma after the complimentary close. |
| Modified block letter style | A business letter format that places the date and closing lines at the horizontal center of the letterhead |
| Netiquette | The generally accepted manners for electronic communications. |
| Open punctuation | A special format for a business letter that omits any punctuation after the salutation and complimentary close. |
| Salutation | The part of a business letter that contains a formal greeting. |