- Subroutines and CALL, passing arguments and receiving parameters
- Nested programs and external subroutines
- Static versus dynamic CALLs
- CALL … ON OVERFLOW and CALL … ON EXCEPTION; CANCEL
- COMMON, GLOBAL, INITIAL, and EXTERNAL attributes
- Defining tables (single- and multi-dimensional)
- Initializing and sorting tables
- PERFORM … VARYING
- Subscripts and indexes
- SET, SEARCH, SEARCH ALL
- ALL subscripting (intrinsic functions)
- Variable length record processing
- INSPECT, STRING, UNSTRING
- COBOL SORT facility
- Dynamic File Allocation
- Pointer, procedure-pointer, and function-pointer data types
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