The term "ANN.7z" refers to a 7-Zip file often analyzed for malware, a B-24 Liberator aircraft nicknamed "Shirley Ann" (tail code 7Z) associated with a Missing Air Crew Report (MACR) , or a string within technical log data. It is likely a cybersecurity report for a suspicious file or a historical document regarding the aircraft, depending on the context. Review the documentation at reddog1944.com for further details. Doug, you have done a very good job on the site