Science

• Position-specific scoring matrix
  Position-specific scoring matrix
  A position weight matrix , also called position-specific weight matrix or position-specific scoring matrix , is a commonly used representation of motifs in biological sequences....
  
   or Position weight matrix, in bioinformatics, a commonly used representation in motifs (patterns) in biological sequences
• Pokeweed mitogen
  Pokeweed mitogen
  Pokeweed mitogen is a mitogen derived from Phytolacca americana. It functions as a lectin....
  
  , a mitogen (chemical substance that triggers mitosis) derived from Phytolacca americana. It functions as a lectin

Technology

• Pulse-width modulation
  Pulse-width modulation
  Pulse-width modulation , or pulse-duration modulation , is a commonly used technique for controlling power to inertial electrical devices, made practical by modern electronic power switches....
  
  , is a very efficient way of providing intermediate amounts of electrical power between fully on and fully off
• The PWM (window manager), an X window manager
• Permanent Way Machine, the British Rail Class 97/6
  British Rail Class 97/6
  The British Rail Class 97/6 0-6-0 diesel shunting locomotives were purpose-built for departmental duties by Ruston & Hornsby at Lincoln in 1953 or 1959...
  
   locomotives
• Panzerwurfmine
  Panzerwurfmine
  The Panzerwurfmine was a shaped charge hand-thrown anti-tank grenade used by Luftwaffe ground troops in World War II.-Appearance:...
  
  , a type of fin-stabilised shaped charge anti-tank hand grenade used by German Luftwaffe ground troops in World War II

Others

• Portland International Jetport
  Portland International Jetport
  Portland International Jetport is a public airport located two miles west of the central business district of Portland, in Cumberland County, Maine, United States. It is owned by the city of Portland...
  
   (IATA airport code: PWM), an airport in Portland, Maine. The "PWM" stands for Portland-Westbrook-Municipal
• Professional Wealth Management
  Professional wealth management
  Professional Wealth Management is a magazine about European wealth management. It is published by the Financial Times group.PWM focuses on open and guided architecture and distribution of third party products by institutions across Europe...
  
  , a financial magazine published by the Financial Times group
• Progressive Writers' Movement
  Progressive Writers' Movement
  The Anjuman Tarraqi Pasand Mussanafin-e-Hind or Progressive Writers' Movement was a progressive literary movement in the pre-partition British India, consisting of a few different writers groups around the world....
  
  , a progressive literary movement in the pre-partition British India, consisting of a few different writers groups around the world