title: PA4
text: # PA4
  
  PA4 may refer to:
  
  * ALCO PA-4, a diesel locomotive
  * Paranormal Activity 4
  * Pennsylvania Route 4
  * Pennsylvania's 4th congressional district
  * Pitcairn PA-4 Fleetwing II, a biplane
  * PA4 paper; see Paper size
  * The PA4, a type of rolling stock used on the PATH train in New York and New Jersey
  