This monitor object (see Section 5.4.14, “The Monitor Class”) holds the default input stream object (see Chapter 14, Input and Output Streams). This input stream is the source for the PARSE LINEIN instruction, the LINEIN method of the Stream class, and, if you specify no stream name, the LINEIN built-in function. It is also the source for the PULL and PARSE PULL instructions if the external data queue is empty.

The default for this object's initial source is the .STDIN stream.