Features p.14 introducing the Smalltalk-80 System [author Adele Goldberg] A readers' guide to the Smalltalk articles in this issue. p.36 The Smalltalk-80 System [author the Xerox Learning Research Group] How message-sending objects are used in the Smalltalk-80 system. p.50 Build a Z8-Based Control Computer with BASIC, Part 2 [author Steve Ciarcia] Steve continues his description of the Z8-BASIC Microcomputer and suggests two applications. p.74 Object-Oriented Software Systems [author David Robson] Object-oriented software systems provide the underlying design of Smalltalk. p.90 The Smalltalk Environment [author Larry Tesler] Programming and debugging in Smalltalk are always interactive activities. p.147 User-Oriented Descriptions of Smalltalk Systems [author Trygve M H Reenskaug] A Smalltalk application program will limit the user's access to the language. p.168 The Smalltalk Graphics Kernel [author Daniel H H Ingalls] The Graphics Kernel provides the interface through which all text and graphics are displayed. p.200 The Japanese Computer invasion [author Stan Miastkowski] Like it or not, the Japanese small computers are on their way. p.230 Building Data Structures In the Smalltalk…