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Vintage IBM PC DOS 6.1 users guide manual

This is a vintage IBM PC DOS 6.1 user’s guide manual. It is an English language operating system designed for IBM-compatible computers with a minimum of 512 KB RAM and less than 50 MB hard drive space. The manual is in the format of a 3.5″ floppy disk and is suitable for a single device. The brand is IBM and the model is DOS 6.1.