The bones of failed Unix systems pioneer Plexus Computers Inc, which has been trading under Chapter XI bankruptcy protection since March, look like going to Recognition Equipment Inc, Dallas. Recognition has a letter of intent to acquire Plexus’ image processing software technology, and hopes to have it wrapped up by mid-July, and intends to trade on the name by setting up a new Plexus Software Inc as a wholly-owned subsidiary, which, it plans, will market a comprehensive line of local area network-based image pro cessing software for complex data processing applications, and take in the Plexus UK subsidiary based in London. Financial terms of the agreement have not been disclosed.