N vs P

N

• The fourteenth letter of the English alphabet, called en and written in the Latin script. 

• north (see also n) 

• navy 

• knight 

• noun 

P

• The sixteenth letter of the English alphabet, called pee and written in the Latin script. 

• The set of all problems that are solvable in polynomial time by a deterministic Turing machine 

• A P wave on an electrocardiogram.