The Model Railroad Planning 25 Year Archive DVD-ROM from Kalmbach includes access to all 25 issues of the essential guide for model railroad planning, construction, and operation in a single package. Inside you'll find a collection of the best and most useful articles for planning your dream layout, 294 detailed track plans, a comprehensive archive of essential tips and techniques, and expert advice from today's best modelers. Also included are articles about planning, track planning, operating a model railroad, construction and scenery. Each issue is easily searched, viewed and bookmarked, and the format allows you to zoom in on text and photos right on your laptop or computer. Model Railroad Planning 25 Year Archive discs will not play on stand-alone DVD players. For use in a computer DVD drive only. Computer requirements for the Model Railroad Planning 25 Year Archive DVD-ROM: PC: Microsoft Windows(R) XP, Vista, 7, 8 or 10, a Pentium 4 or higher processor with 1GB RAM. Mac: OSX(R) 10.4.11 or higher running on a Power PC G5 or faster (Intel) processor All computers must have a DVD-ROM drive, 800x600 minimum screen resolution (1024x768 recommended) and Adobe(R) Acrobat(R) Reader 9 or later.