LEGO Color Sensor - EV3 My son is using his EV3 with a color sensor. He is using the sensor to test the reflectivity of different materials. Can you please tell me what the letters "PCT" stand for?
Based on this API reference and this discussion of the color sensor it looks like "pct" is short for percent as in a ratio with 100.

David added in a comment:


  EV3 hardware developer kit provides a bit more info on what 100% means: 
  
  
    The output from the sensor within light sensor mode is a value between 0 – 100 where 0 equals no reflected light measured and 100 equals full light reflection.