PROCEDURE Close(s: Stream) : BOOLEAN; PROCEDURE Release(s: Stream); PROCEDURE CloseAll;

PROCEDURE ReadByte(s: Stream; VAR byte: BYTE) : BOOLEAN; PROCEDURE ReadPart(s: Stream; VAR buf: ARRAY OF BYTE; off, cnt: Count) : BOOLEAN; PROCEDURE Read(s: Stream; VAR buf: ARRAY OF BYTE) : BOOLEAN; PROCEDURE ReadPacket(s: Stream; VAR buf: ARRAY OF BYTE; off, maxcnt: Count) : Count;