IRXARGTB REXX Argument Table (ARGTABLE)
IRXCMPTB REXX Compiler Programming Table
IRXDSIB REXX Data Set Information Block
IRXEFPL External Functions parameter list
IRXENVB REXX Environment Block
IRXEVALB REXX Evaluation Block (EVALBLOCK)
IRXEXECB REXX EXEC block (EXECBLK)
IRXEXTE REXX Vector of External Entry Points
IRXFPDIR REXX Function Package Directory
IRXINSTB REXX In-Storage Block (INSTBLK)
IRXMODNT REXX Module Name Table (MODNAMET)
IRXPACKT REXX Function Package Table (PACKTB)
IRXPARMB REXX Parameter Block (PARMBLOCK)
IRXSHVB Shared REXX Variable Request Block
IRXSUBCT REXX Subcommand Table (SUBCOMTB)
IRXWORKB REXX Work Block Extension (WORKBLOK_EXT)