PART-TIME, PART TIME – Hyphenate as an adjective: She is a part-time student. Otherwise two words: She works in the office part time.
PDF – Abbreviation for portable document format. Use all uppercase unless appended to a file name to designate type of file extension: Email a PDF of the new schedule. The file name is schedule.pdf.
PERCENT – Spell out the word percent, do not use the symbol %. Use figures with percentages: 4 percent. In some cases such as in tables or statistical copy, the % symbol may be appropriate.
PHD – see academic degrees
POST – Words beginning with the prefix post- are usually closed, no hyphen, unless the root word is a proper noun; post-Cold War.
PRE- - Words beginning with prefix pre- are usually closed, no hyphen, unless the root word is a proper noun; prescheduled class.
PRESIDENT – Capitalize only as a formal title before one or more names: President Obama, Presidents Bush and Lincoln. Lowercase in all other uses: the president; George Washington, first president of the United States.
PRODUCT/COMPANY NAMES – The use of product names or company names may be construed as a tacit endorsement by the School and university, thus raising conflict-of-interest questions and other problems. Use generic titles or descriptions whenever possible: Please make a duplicate copy. (Wrong: Please make a Xerox copy.)
PROFESSOR – Capitalize before a name, lowercase in all other uses. Abbreviate professor only in front of first and last name, spell out professor when coming before a last name alone. A named professor is always capitalized. Always identify faculty by their academic rank and department in published materials. Forms are: professor, associate professor, assistant professor of – followed by the applicable field: Professor of International Law Ian Johnstone; Prof. Ian Johnstone; Ian Johnstone, professor of international law; he is a professor at The Fletcher School.