Structure that contains System Field Values
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SYST
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SLIS
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STXT
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None
SYST (also commonly referred to as SY) is the ABAP structure that contains system field values. It includes fields like SY-DATUM (current date), SY-UZEIT (current time), SY-UNAME (user name), SY-MANDT (client), etc. These fields are automatically populated by the SAP system at runtime. SLIS is used for ALV (ABAP List Viewer) and STXT is not a standard system structure.
SYST (often referenced via the short form SY) is the built-in ABAP structure that holds system fields like the current date, time, user, return codes, and subrc values, which programs read constantly during execution. SLIS and STXT relate to other purposes (ALV list structures and text objects respectively), not general system field values.