See also: ᛊ [U+16CA RUNIC LETTER SOWILO S], 
ⵉ [U+2D49 TIFINAGH LETTER YI], 
∑ [U+2211 N-ARY SUMMATION], 
ʃ [U+0283 LATIN SMALL LETTER ESH], and Σ [U+03A3 GREEK CAPITAL LETTER SIGMA]
 
 
Translingual
Letter
Ʃ upper case (lower case ʃ)
-  The upper-case letter esh, used in the Pitman alphabet and in writing certain African languages