This vintage IBM Disk Operating System DOS Version 3.30 package is a gem for any computer enthusiast. The set includes 5.25" big box software and references, perfect for those looking to relive the nostalgia of the early days of computing. Made in the United States, this package is a testament to the quality of American manufacturing.The brand of this package is IBM, a name synonymous with the early days of computing. This item is listed in the Other Vintage Computing, Vintage Computing, and Computers/Tablets & Networking categories. Please note that this package has not been modified in any way and is sold as is.