PM

PM or pm may refer to:

• Post meridiem (p.m.), the second half of the day on a 12-hour clock
• Prime minister
• Promethium (symbol Pm), a chemical element
• Petametre (Pm), a unit of length (10¹⁵ m)
• Picometre (pm), a unit of length (10⁻¹² m)
• Picomolar (pM), a unit of molar concentration
• Particulate matter, very small particles suspended in the air
• Saint Pierre and Miquelon (ISO country code)
  • .pm, internet top-level domain for Saint Pierre and Miquelon

• All pages beginning with PM
• All pages with titles containing pm