SZ may refer to

• the Canton of Schwyz
• the NATO country code for Switzerland
• the Slovenian railway company, Slovenske železnice (SŽ)
• Szöllösy, the catalogue of all the compositions of Béla Bartók

the grapheme sz is View from hiking trail between Ibergeregg and Spirstock Schwyz (German  ) is a canton in central Switzerland between Lake Lucerne in the south and Lake Zurich in the north, centered around and named after the town of Schwyz. ... This is the list of NATO country codes. ... Slovenske železnice (SŽ) (Slovenian Railways) is the state railway of Slovenia, created in 1991 from the Ljubljana Division of the former Jugoslovenske železnice -- (JŽ) - Yugoslav Railways -- after the breakup of Yugoslavia. ... The Szöllösy index (Sz. ... Béla Viktor János Bartók (March 25, 1881 – September 26, 1945) was a Hungarian composer, pianist and collector of Eastern European and Middle Eastern folk music. ...

• In Polish, representing the sound 'sh'.
• In Hungarian, representing the sound 's' (while 's' is pronounced as [sh]), see Hungarian sz.
• In German, the historical origin of the ligature ß.

the acronym sz is Linguistics & Pronunciation Sz is the thirty-second letter of the Hungarian alphabet. ... The glyph ß is a ligature of ſ (long s) and s or z that has become a distinct letter in the German alphabet; its German name is Eszett (IPA: ) or scharfes S (sharp S). ...

• In C (programming language), an acronym representing 'string terminated by zero', aka C string.
• In programming often used as a suffix of an identifier describing any kind of size. For example, "bufsz" for "buffer size".

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