PAR11 is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Unions" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_PAR11 TYPE PAR11.
The PAR11 table consists of various fields, each holding specific information or linking keys about Unions data available in SAP. These include BUKRS (Company Code), BUTXT (Name of Company Code or Company), STEXT (Object Name), ENAME (Formatted Name of Employee or Applicant)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .