Original sentence: Other parties frequently disregard these guidelines, willfully treating "unix" as a generic term or descriptor for operating systems that are not necessarily covered by the "UNIX" trademark.Some abbreviate or "wildcard" the name as "*nix" (or some similar construction), which is also contrary to Open Group guidelines.The closest phrase they consider correct is "UNIX system-like".Their guidelines require "UNIX" to be presented in uppercase or otherwise distinguished from the surrounding text, strongly encourage using it as an adjective for a generic word such as "system", and discourage its use in hyphenated phrases.They do not approve of the construction "Unix-like", and consider it misuse of their trademark
Edited sentence: They consider "UNIX-like" to be a misuse of the trademark, because a trademark should not be hyphenated.They suggest "UNIX system-based" or "UNIX system-like"