CLHS: Section 21.1.1.3

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## 21.1.1.3 Other Subclasses of Stream

The class stream has a number of subclasses defined by this specification. The next figure shows some information about these subclasses.

    Class                Related Operators
    broadcast-stream     make-broadcast-stream
                         broadcast-stream-streams
    concatenated-stream  make-concatenated-stream
                         concatenated-stream-streams
    echo-stream          make-echo-stream
                         echo-stream-input-stream
                         echo-stream-output-stream
    string-stream        make-string-input-stream
                         with-input-from-string
                         make-string-output-stream
                         with-output-to-string
                         get-output-stream-string
    synonym-stream       make-synonym-stream
                         synonym-stream-symbol
    two-way-stream       make-two-way-stream
                         two-way-stream-input-stream
                         two-way-stream-output-stream

Figure 21-5. Defined Names related to Specialized Streams

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