Sha

Sha (Ш, ш) is the 25th letter of the Cyrillic alphabet. It looks something like a W or more exactly like an E lying on its back. Its pronounciation is /S/ in SAMPA which is equivalent to sh (English), ch (French), sch (German), ş (Turkish), sz (Polish) or most exactly to š as its scientific equivalent as this letter is used in most Latin-written Slavic languages for this sound.

This sound is described as a voiceless postalveolar fricative and postalveolar fricatives are the major reason why the Glagolitic and later the Cyrillic alphabet were invented because Slavic languages are rich on postalveolar fricatives and you cannot write these sounds with a simple Roman or Greek letter without diacritics. Hence Sha is one of the most typical letters of the Cyrillic alphabet.

Sha has its earliest ties in Hebrew Shin (ש) and when Saint Cyril and Methodius invented Glagolitsa, Sha already possessed its current form and has been the only letter being that permanent in its form. Most letters of Cyrillic script have been derived from Greek and as there was no Greek sign for the Sha sound, Glagolitic Sha was adopted.

Cyrillic alphabet
А A;	Б Be;	В Ve;	Г Ge;	Ѓ Gje;	Ґ Ghe;	Д De;	Ђ Dje;	Е E;	Є Ukranian E;	Ѐ E with grave;	Ё Yo;	Ж Zhe;
Ѕ Dze;	З Ze;	И I;	Й I short;	Ѝ I with grave;	І Ukrainian I;	Ї Yi;	Ј Je;	К Ka;	Ќ Kje;	Ћ Tshe;	Л El;	Љ Lje;
М Em;	Н En;	Њ Nje;	О O;	П Pe;	Р Er;	С Es;	Т Te;	Ѹ Ou;	У U;	Ў U short;	Ф Ef;	Х Ha;
Ѡ Omega Cyrillic;	Ц Tse;	Ч Che;	Џ Dzhe;	Ш Sha;	Щ Shcha;	Ъ Hard sign (yer);	Ы Yery;	Ь Soft sign;	Ѣ Yat;	Э E reversed;	Ю Yu;	Я Ya
(not in Unicode) A iotified	Ѥ E iotified;	Ѧ [[Yus; small]]	Ѫ [[Yus; big]]	Ѩ [[Yus; small iotified]]	Ѭ [[Yus; big iotified]]	Ѯ Ksi Cyrillic;	Ѱ Psi Cyrillic;	Ѳ Fita;	Ѵ Izhitsa;	Ѷ Izhitsa with double grave;

(Russian letters bolded; old letters italics)

SHA is an abbreviation of The Swedish Hackers Assocation.