S(2)code point

In  character encoding  terminology, a  code point  or  code position  is any of the numerical values that make up the  code space . For example,  ASCII  comprises 128 code points in the range 0 _hex  to 7F _hex ,  Extended ASCII  comprises 256 code points in the range 0 _hex  to FF _hex , and  Unicode  comprises 1,114,112 code points in the range 0 _hex  to 10FFFF _hex . The Unicode code space is divided into seventeen  planes  (the basic multilingual plane, and 16 supplementary planes), each with 65,536 (= 2 ¹⁶ ) code points. Thus the total size of the Unicode code  space  is 17 × 65,536 =  1,114,112 .(FROM WIKIPEDIA)