: While .7z is a common compressed file format (7-Zip), in this specific instance, it is a livestock tattoo code where "7" is the individual number and "Z" represents the year of birth in the international year-letter code system. March 27, 2011 • 1 p.m. - Stallings Polled Herefords
The reference to appears in the context of livestock registration for a Polled Hereford cow named AR MS DELILAH 7Z .
: You can look up the animal's records using her name or tattoo number on the American Hereford Association (AHA) website .