SUI is the French abbreviation for Switzerland, Sz is for Germany, and CH the Latin abbreviation which is the official abbreviation for Switzerland.
It depends on the issue:
Official country abbreviation is only 'CH' (confoederatio helvetica). As postal code addition or car identifier, etc. This is equivalent to what other countries use... i.e. 'F' for France, 'D' for Germany...
In sports the official abbreviation of Switzerland is 'SUI' (from Suisse, french for Switzerland). This is equivalent to what other countries use... i.e. 'FRA' for France, 'GER' for Germany...
You may find differences... but this should be used for the specific issues.
DE is the abbreviation of Germany. SUI is FIFA Country Code for Switzerland.
'Sui' is the accepted three word abbreviation for the country of Switzerland.
SUI is not an official abbreviation for any country
Switzerland.
Switzerland
:-) because "S" was already taken by Sweden :-) CH means confoederatio helvetica, Swiss or helvetic confederation... and is the international abbreviation for Switzerland (as D for Germany or I for Italy or GB for the United Kingdom). In sports the international abbreviation is SUI (Suisse, french for Switzerland)... again like GER for Germany ITA for Italy or GBR for the United Kingdom.
Stress Urinary Incontinence
In the Olympics, each participating country is designated by a 3-digit code. The letters SUI represent Switzerland.
State Unemployment Insurance is one meaning. If this doesn't fit, you will need to give information as to how SUI was used in your particular case.
Switzerland
Nicola Spirig Switzerland (SUI)
CH is the abbreviation of Switzerland's official name Confederatio Helvetica.