A pipe specifier is a string beginning and/or ending with the pipe character. Under UNIX, the pipe character is the vertical bar, "|". The remainder of the string specifies one or more processes to be executed. If the pipe-specifier begins with the "|" pipe character, then OUTPUT can be used to send information to the process. If the pipe-specifier ends with the pipe character, then ENTER can be used to get information from the process. Pipes are not supported by HTBasic.