IBM Asynchronous Communication Support version 1.00 for vintage PC. Original disk (6025213) and manual in three-ring binder (6024032) with outer slipcover. The back page of the manual has some notes written in pen. I do not have any means of testing the disk, so it is sold as-is, no guarantees. Free shipping anywhere within the U.S. International shipping will vary by destination; please ask if interested. I welcome lower offers, especially if you are buying multiple items at once. To make a lower offer, add the item(s) to your cart and on the checkout page you will be given the option to name your own price. (If you are not seeing this option, it may be because your state requires sales tax. Bonanza is working on a fix for this issue, but you can also send me a direct message with your offer.) Full information about making offers here.