Streams are printed in the following formats.
#<input stream file-name >
An input stream from the file file-name .
#<output stream file-name >
An output stream to the file file-name .
#<string-input stream from string >
An input stream generated by (make-string-input-stream string ).
#<a string-output stream>
An output stream generated by the function make-string-output-
stream.
#<a two-way stream>
A stream generated by the function make-two-way-stream.
#<an echo stream>
A bidirectional stream generated by the function make-echo-stream.
#<synonym stream to symbol >
The stream generated by (make-synonym-stream symbol ).
#<a concatenated stream>
An input stream generated by the function make-concatenated-stream.
#<a broadcast stream>
An output stream generated by the function make-broadcast-stream.