Streams HS: Introduction to Streams PCL: Other Kinds of I/O *debug-io* *error-output* *query-io* *standard-input* *standard-output* *trace-output* *terminal-io* stream-element-type open stream-external-format close with-open-stream listen make-synonym-stream synonym-stream-symbol broadcast-stream-streams make-broadcast-stream make-two-way-stream two-way-stream-input-stream two-way-stream-output-stream echo-stream-input-stream echo-stream-output-stream make-echo-stream concatenated-stream-streams make-concatenated-stream get-output-stream-string make-string-input-stream make-string-output-stream stream-error-stream Predicates streamp object ⇒ boolean input-stream-p stream ⇒ boolean output-stream-p stream ⇒ boolean interactive-stream-p stream ⇒ boolean open-stream-p stream ⇒ boolean