@iftex
@finalout
@end iftex
-@comment $Id: user.texinfo,v 1.62 1999/08/04 01:12:42 cph Exp $
+@comment $Id: user.texinfo,v 1.63 1999/08/13 00:24:30 cph Exp $
@comment %**start of header (This is for running Texinfo on a region.)
@setfilename user.info
@settitle MIT Scheme User's Manual
@titlepage
@title{MIT Scheme User's Manual}
-@subtitle Edition 1.62
+@subtitle Edition 1.63
@subtitle for Scheme Release 7.5
-@subtitle 22 July 1999
+@subtitle 12 August 1999
@author by Stephen Adams
@author Chris Hanson
@author and the MIT Scheme Team
@item
Low-level port data abstraction has been overhauled. New design has
@dfn{port types} that contain the operations for the port, and are
-shared between all ports of a given type. New port abstraction supports
-a form of encapsulation, allowing the construction of ports that
-encapsulate other ports in controlled ways.
+shared between all ports of a given type.
@item
@code{bkpt} is no longer a macro. Instead, it extracts an environment