The signature of good taste. From silverware to thank-you notes, replying to invitations to sending e-mail, inviting the boss to lunch to making a condolence call, here is the essential guide you need to handle all everyday social situations with ease. In question-and-answer format, etiquette expert Peggy Post provides up-to-the-minute advice fore a range of situations at home and on the job, including: telephone and computer manners tipping table...