Dan's 20th Century Abandonware is a representation of my collection of legacy computer software, computer systems and memorabilia. There are screen shots, photos, and a wealth of information. Much of this software is still used today! Dan's 20th Century Abandonware ("D2CA") is a website representing my personal goal to collect and preserve as much non-game legacy software as I am able to acquire in a format where it can be both archived for preservation and retrieved and used on compatible computer systems. I collect and preserve commercial legacy software titles from their original commercial media only. There is no moral, nostalgic, useful or historical value in preserving illegal pirated "warez" copies. All copyright laws are observed in this endeavor. I also preserve some of the more rare shareware, freeware and Public Domain software titles. Before being added to my legacy software collection, each individual title is tested for completeness, media defects and malware. If a title is not complete, has unreadable media, or has unremovable malware, it does not become a part of Dan's 20th Century Abandonware. In order to test the legacy software programs in this collection, I have had to acquire many vintage and some very rare computer hardware systems. A legacy computer hardware section was created to allow visitors to view photos and learn about these classic computers. Many of these systems are very hard to find today and have a significant historical value.