Binary streams contain a sequence of bytes. For binary streams, the library does not translate any characters on input or output. It treats them as a continuous stream of bytes, and ignores any record boundaries. When data is written out to a record-oriented file, it fills one record before it starts filling the next. Streams in the z/OS® UNIX file system follow the binary model, regardless of whether they are opened for text, binary, record I/O, or blocked I/O. You can simulate record I/O by using new-line characters as record boundaries.