Run time

Clarified the information about file handling for COBOL programs with RECORDING MODE U under OS/390®, Version 2 Release 10.
Added information about the change in the amount of space that is used for an output file that is defined as RECFM=U under OS/390, Version 2 Release 10.
Added information about dynamic calls to assembler programs under Language Environment® for z/OS®, Version 1 Release 2 and later.