Almost all free/open source software licenses include a section disclaiming any warranty or liability. This is not new; A 1985 licence for GNU Emacs includes the following:
GNU Emacs is distributed in the hope that it will be useful, but without any warranty. No author or distributor accepts responsibility to anyone for the consequences of using it or for whether it serves any particular purpose or works at all, unless he says so in writing.
It seems that the writers of early software licenses were aware that distributing software risked being construed as providing a warranty. Were there any notable cases in which a software distributor was sued for providing an implied warranty? Is similar phrasing used in other fields that software licenses would have borrowed this style of phrasing from? What is the broader pre-1985 historical context surrounding the "No Warranty" clause in software licenses?