If the use of graph theory raises a question, this article will supply an answer. The authors introduce the fundamental concepts of graph theory and two methods of directed-graph storage.

[author : Michael Ashbrook and Helmut Zinn]

Steve Garcia shows how he uses his computer to monitor and control a Hydrostove - a wood stove that heats water piped through it.

[author : Steve Ciarcia]

Part 2 of this article shows how to construct the design that was presented in the January 1980 BYTE, using the Heathkit ET-3400 microprocessor trainer.

[author : John H Gibson]

Using linked lists to maintain sorted files is one way to deal with limited memory, large files, and additions and deletions to these files.

[author : Ted Carter]

This general-purpose algorithm performs these conversions and assembler programs for the 8080 processor.

[author : Michael McQuade]

Most investors will agree that financial stability and success require an organized systematic means of assessing investments. The program written by John Lehman can output the typical information required for such a financial report.

[author : John H Lehman]

Robert Newcomb tells how to construct and program the low-cost plotting system described by Peter Lucas in the February 1979 BYTE. Robert uses a KIM-I and various electromechanical parts.

[author : Robert K Newcomb]

The method described by Scott Jones can be applied to a wide range of problems in business and industry as well as conflict simulations and games.

[author : Scott T Jones]

Building this interface solves the occasional problem of having one interface port and the need to use three or four peripherals.

[author : Stephen A Alpert]

Some programming languages are more appropriate to a particular application than others. This comparison will help you choose the right language from the many possibilities.

[author : Robert A Morris]

The feature provided here will give your BASIC package the control where a particular piece of information will appear on a line when you are performing input and output routines.

[author : William D Roch]

The Seven Bridges of Königsberg

Gasuse

String Comparator for Horizon

Some Example Plots

Introduction to Code Tightening

Mining the Skip Chain for Extra Bytes of Code

Audio Meter for Your TRS-80

Algebraic Identities Are Not Numerical Identities

Topology is the theme of this month's cover painting, "The Seven Bridges of Königsberg" by Robert Tinney. It is a fanciful representation of a classical, topological problem made famous by the Swiss mathematician Euler, and it has a more than passing resemblance to the works of the Swiss artist M C Escher. The celebrated problem is discussed in detail by Carl Helmers in this month's editorial, and the Painting is also loosely inspired by the theme article, "A First Look at Graph Theory Applications," by Ashbrook and Zinn. Sharp-eyed readers might spot a visual reference to another famous mathematical problem hidden in the cover.