This manual is a valuable addition to any Commodore enthusiast's collection. The Trio 5.25" manual provides detailed instructions and schematics for this vintage computing accessory. The brand of this product is Commodore and it is compatible with Commodore computers. It is a great piece of vintage computing history and a must-have for any collector.The manual is a helpful resource for anyone looking to use or repair their Trio 5.25" accessory. It contains clear and concise instructions, as well as detailed schematics and diagrams. This item is part of the Vintage Parts & Accessories category, under Computers/Tablets & Networking in the marketplace.