Texas Instruments Inc has given up on its TI Professional Computer but is offering owners of that machine an upgrade to the TI Business Pro AT-alike: it will offer people who bring in Professionals between $2,640 and $3,135 toward a Business Pro, the minimum configuration of which comes with 512Kb 80286, 1.2Mb floppy, MS-DOS 3.2, and mono monitor; the trade-in offer will last indefinitely, and the Business Pro can in turn be upgraded into a model of the System 1000 series of multi-user Xenix machines by changing the motherboard – but there is no cash inducement to do that; Texas rightly points out that most manufacturers who discontinue their machines simply leave the users as orphans – so the company has learned something from all the ill-will it generated by its abrupt abandonment of its home computer business.