1. Buffering
   1. APT_BUFFER_FREE_RUN
   2. APT_BUFFER_MAXIMUM_MEMORY
   3. APT_BUFFER_MAXIMUM_TIMEOUT
   4. APT_BUFFER_DISK_WRITE_INCREMENT
   5. APT_BUFFERING_POLICY
   6. APT_SHARED_MEMORY_BUFFERS
2. Building Custom stages
   1. DS_OPERATOR_BUILDOP_DIR
   2. OSH_BUILDOP_CODE
   3. OSH_BUILDOP_HEADER
   4. OSH_BUILDOP_OBJECT
   5. OSH_BUILDOP_XLC_BIN
   6. OSH_CBUILDOP_XLC_BIN
3. Compiler
   1. APT_COMPILER
   2. APT_COMPILEOPT
   3. APT_LINKER
   4. APT_LINKOPT
4. DB2 Support
   1. APT_DB2INSTANCE_HOME
   2. APT_DB2READ_LOCK_TABLE
   3. APT_DBNAME
   4. APT_RDBMS_COMMIT_ROWS
   5. DB2DBDFT
5. Debugging
   1. APT_DEBUG_OPERATOR
   2. APT_DEBUG_MODULE_NAMES
   3. APT_DEBUG_PARTITION
   4. APT_DEBUG_SIGNALS
   5. APT_DEBUG_STEP
   6. APT_DEBUG_SUBPROC
   7. APT_EXECUTION_MODE
   8. APT_PM_DBX
   9. APT_PM_GDB
   10. APT_PM_SHOW_PIDS
   11. APT_PM_XLDB
   12. APT_PM_XTERM
   13. APT_SHOW_LIBLOAD
6. Decimal Support
   1. APT_DECIMAL_INTERM_PRECISION
   2. APT_DECIMAL_INTERM_SCALE
   3. APT_DECIMAL_INTERM_ROUND_MODE
7. Disk IO
   1. APT_BUFFER_DISK_WRITE_INCREMENT
   2. APT_CONSISTENT_BUFFERIO_SIZE
   3. APT_EXPORT_FLUSH_COUNT
   4. APT_IO_MAP/APT_IO_NOMAP and APT_BUFFERIO_MAP/APT_BUFFERIO_NOMAP
   5. APT_PHYSICAL_DATASET_BLOCK_SIZE
8. General Job Admin
   1. APT_CHECKPOINT_DIR
   2. APT_CLOBBER_OUTPUT
   3. APT_CONFIG_FILE
   4. APT_DISABLE_COMBINATION
   5. APT_EXECUTION_MODE
   6. APT_ORCHHOME
   7. APT_STARTUP_SCRIPT
   8. APT_NO_STARTUP_SCRIPT
   9. APT_STARTUP_STATUS
   10. APT_THIN_SCORE
9. Job Monitoring
   1. APT_MONITOR_SIZE
   2. APT_MONITOR_TIME
   3. APT_NO_JOBMON
   4. APT_PERFORMANCE_DATA
10. Misc
    1. APT_COPY_TRANSFORM_OPERATOR
    2. “APT_EBCDIC_VERSION” on page 65
    3. APT_DATE_CENTURY_BREAK_YEAR
    4. APT_IMPEXP_ALLOW_ZERO_LENGTH_FIXED_NULL
    5. APT_IMPORT_REJECT_STRING_FIELD_OVERRUNS
    6. APT_INSERT_COPY_BEFORE_MODIFY
    7. APT_OLD_BOUNDED_LENGTH
    8. APT_OPERATOR_REGISTRY_PATH
    9. APT_PM_NO_SHARED_MEMORY
    10. APT_PM_NO_NAMED_PIPES
    11. APT_PM_SOFT_KILL_WAIT
    12. APT_PM_STARTUP_CONCURRENCY
    13. APT_RECORD_COUNTS
    14. APT_SAVE_SCORE
    15. APT_SHOW_COMPONENT_CALLS
    16. APT_STACK_TRACE
    17. APT_WRITE_DS_VERSION
    18. OSH_PRELOAD_LIBS
11. Lookup
    1. APT_LUTCREATE_NO_MMAP
12. Network
    1. APT_IO_MAXIMUM_OUTSTANDING
    2. APT_IOMGR_CONNECT_ATTEMPTS
    3. APT_PM_CONDUCTOR_HOSTNAME
    4. APT_PM_NO_TCPIP
    5. APT_PM_NODE_TIMEOUT
    6. APT_PM_SHOWRSH
    7. APT_PM_USE_RSH_LOCALLY
    8. APT_RECVBUFSIZE
    9. APT_RECVBUFSIZE
13. NLS
    1. APT_COLLATION_SEQUENCE
    2. APT_COLLATION_STRENGTH
    3. APT_ENGLISH_MESSAGES
    4. APT_IMPEXP_CHARSET
    5. APT_INPUT_CHARSET
    6. APT_OS_CHARSET
    7. APT_OUTPUT_CHARSET
    8. APT_STRING_CHARSET
14. Oracle Support
    1. APT_ORACLE_LOAD_DELIMITED
    2. APT_ORACLE_LOAD_OPTIONS
    3. APT_ORACLE_NO_OPS
    4. APT_ORACLE_PRESERVE_BLANKS
    5. APT_ORA_IGNORE_CONFIG_FILE_PARALLELISM
    6. APT_ORA_WRITE_FILES
    7. APT_ORAUPSERT_COMMIT_ROW_INTERVAL APT_ORAUPSERT_COMMIT_TIME_INTERVAL
15. Partitioning
    1. APT_NO_PART_INSERTION
    2. APT_PARTITION_COUNT
    3. APT_PARTITION_NUMBER
16. Reading/Writing files
    1. APT_DELIMITED_READ_SIZE
    2. APT_FILE_IMPORT_BUFFER_SIZE
    3. APT_FILE_EXPORT_BUFFER_SIZE
    4. APT_IMPORT_PATTERN_USES_FILESET
    5. APT_MAX_DELIMITED_READ_SIZE
    6. APT_PREVIOUS_FINAL_DELIMITER_COMPATIBLE
    7. APT_STRING_PADCHAR
17. Reporting
    1. APT_DUMP_SCORE
    2. APT_ERROR_CONFIGURATION
    3. APT_MSG_FILELINE
    4. APT_PM_PLAYER_MEMORY
    5. APT_PM_PLAYER_TIMING
    6. APT_RECORD_COUNTS
    7. OSH_DUMP
    8. OSH_ECHO
    9. OSH_EXPLAIN
    10. OSH_PRINT_SCHEMAS
18. Sorting
    1. APT_NO_SORT_INSERTION
    2. APT_SORT_INSERTION_CHECK_ONLY
19. Teradata Support
    1. APT_TERA_64K_BUFFERS
    2. APT_TERA_NO_ERR_CLEANUP
    3. APT_TERA_NO_PERM_CHECKS
    4. APT_TERA_NO_SQL_CONVERSION
    5. APT_TERA_SYNC_DATABASE
    6. APT_TERA_SYNC_USER
20. Transport Blocks
    1. APT_AUTO_TRANSPORT_BLOCK_SIZE
    2. APT_LATENCY_COEFFICIENT
    3. APT_DEFAULT_TRANSPORT_BLOCK_SIZE
    4. APT_MAX_TRANSPORT_BLOCK_SIZE/ APT_MIN_TRANSPORT_BLOCK_SIZE
21. SAS Support
    1. APT_HASH_TO_SASHASH
    2. APT_NO_SASOUT_INSERT
    3. APT_NO_SAS_TRANSFORMS
    4. APT_SAS_ACCEPT_ERROR
    5. APT_SAS_CHARSET
    6. APT_SAS_CHARSET_ABORT
    7. APT_SAS_COMMAND
    8. APT_SASINT_COMMAND
    9. APT_SAS_DEBUG
    10. APT_SAS_DEBUG_IO
    11. APT_SAS_DEBUG_LEVEL
    12. APT_SAS_DEBUG_VERBOSE
    13. APT_SAS_NO_PSDS_USTRING
    14. APT_SAS_S_ARGUMENT
    15. APT_SAS_SCHEMASOURCE_DUMP
    16. APT_SAS_SHOW_INFO
    17. APT_SAS_TRUNCATION