Vol 9, Issue 5 The CD-ROM magazine for RISC OS users. Foundation RISCWorld issue picker Volume 1 Volume 2 Volume 3 Volume 4 Volume 5 1 2 3 4 5 6 7 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 Volume 6 Volume 7 Volume 8 Volume 9   1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6   Search Foundation RISC World Search   Obituary Andrew Bryden A much loved member of the WROCC has passed away. News and Comment News The latest news to land on the RISCWorld editorial desk... Editorials Editors Corner The Editor's own safe haven. From the Cutting Edge The latest from RISCOS Ltd... Regulars Disc World Find out what software's on this issues CD-ROM. Letters Page All the words that matter from our readers. PD World Paul Brett writes about the PD scene. VirtualAcorn TechSupport The latest from Aaron's tech support notebook... Features Acorn Second Processors Dave Daniels gives us the full story... The RISC OS Time Machine Impression It's 20 years since Impression was first launched... Remember the RiscStation It promised so much a decade ago... Beginners guide to WIMP Programming Beginners guide to WIMP Programming The index for our latest serialisation. Preface 1 Preface to the first edition. Preface 2 Preface to the second edition. Multi-taking programs A simple introduction... Our New Directory The basis if an application... Getting on the iconbar The first part of a multi-tasking app... Messages and Mouse Clicks Receiving input from the user... Opening Windows Displaying information... Icons and Indirected data Populating your windows... Windows: The easy Way Using tools to speed up development... Hardware Iyonix Issues Matt Thompson with the latest Iyonix news... Software - Locus Locus The latest Foundation RISCWorld free software giveaway... Introduction Introducing Locus... The Main Controls The main window buttons explained... Menus Using the application menus... Dialogue boxes Using the dialogue boxes.. Appendix A - Formula Input How to enter your calculations... Appendix B - Data Set Input Entering the data... Appendix C - Keyboard Shortcuts Improve your productivity... Software - Locus Tutorial Locus Tutorial Worked examples to get the best from Locus... Getting Started Getting the feel for Locus... Domain and Ranges The second exercise.... Zooms and Rescaling Examining your plot in detail... Constants and Families Some of the math explained... Polar graphs Producing graphs correctly... Implicit Graphs More complex plotting... Data Sets Advanced use of data sets... Fitting curves Advanced data manipulation... Transformations Using a transformation matrix... Calculus Using Calculus to enhance your plot... Saving your work Keeping a copy of your data and plots... Shows RISC OS eXperience 2009 The only show outside the UK gets the go ahead... Wakefield 2009 We preview the biggest RISC OS show of the year... The Endpiece The Hugh Jampton Experience If I had a hammer, it'd be more interesting than this... Copyright © 3QD Developments Ltd & Aaron Timbrell 2026. RISCWorld was published by APDL between 2000 and 2009. RISCWorld issues are exclusively available from www.riscos.com 'Unofficial Mirrors' are out of date and include pirated content. Last Updated 07/04/2026