Foreground p.66 THE STANDARD DATA ENCRYPTION ALGORITHM, Part 1: An Overview [author Robert V Meushaw] A detailed description of a "trap door" algorithm p.94 DESIGNING WITH DOUBLE SIDED PRINTED CIRCUIT BOARDS [author David Lamkins] This do-it-yourself technique can save you space p.114 DESIGNING A ROBOT FROM NATURE, Part 2: Constructing the Eye [author Andrew Filo] Design details of the robot's eye in the second of this 2 part article p.142 A STEPPING MOTOR PRIMER, PART 2 [author Paul Giacomo] Interfacing to your computer, and other considerations p.150 BUILD A COMPUTER CONTROLLED SECURITY SYSTEM FOR YOUR HOME, Part 3 [author Steve Ciarcia] Ultrasonics, infrared beams and other exotic ways to make your home secure p.196 THE POWER OF THE HP-67 PROGRAMMABLE CALCULATOR, Part 1 [author Robert C Arp Jr] Learn to use one of the most powerful programmables Background p.12 BUILDING THE HEATH H8 COMPUTER [author Dr Paul R Poduska] A review of a popular computer kit p.14 A MAP OF THE TMS-9900 INSTRUCTION SPACE [author Henry Melton] Organizing one's approach to a machine with 215.95 legal instructions p.32 FILES ON PARADE, Part 2: Using Files [author Mark Klein] File protection systems and sundry other matters p.46 A MICROPROCESSOR FOR THE REVOLUTION: THE 6809, Part 3 [author Terry Ritter and Joel Boney] Final thoughts about the successor to the Motorola 6800 processor p.56 CRYPTOGRAPHY IN THE FIELD, Part 1: An Overview [author John P Costas, Phd] A brief historical look at cryptography p.80 PREVIEW OF THE Z-8000 [author Ira Rampil] A look at Zilog's new 16 bit processor p.170 COMMON MISTAKES USING WARNIER-ORR DIAGRAMS [author David Higgins] Avoiding pitfalls when using this alternate flowcharting method p.194 PASSWORD PROTECTION FOR YOUR COMPUTER [author R Jordan Kreindler] How to keep data and information "for your eyes only" p.230 WHAT IS AN INTERRUPT? [author R Travis Atkins] Learn how to use peripherals efficiently with interrupts p.238 HISTORY OF COMPUTERS: THE IBM 650 [author Keith S Reid-Green] A glance at a past favorite Nucleus p.6 Don't Overlook LISP p.10 Letters p.26 Desk Top Wonder: Race Car for the SR-52 p.42 Book Review p.53 Event Queue p.92 Programming Quickie: Inverse Trig Functions p.92 Machine Language Puzzler: Odd Tones p.107 BYTE News p.182 Technical Forum p.206 Nybbles: Computer Assisted Flight Planning p.222 Clubs and Newsletters p.224 BYTE's Bits p.241 What's New? p.270 Unclassified Ads p.272 BOMB p.272 Reader Service Cover Art: THROUGH THE TRAP DOOR [author Robert Tinney]
