I manage an armory bay in the marines which is ALOT of numbers. Each rifle, scope, and optic has its own individual serial number. Think of trying to find a specific one for whatever reason through an array of 170+ rifles. Excel actually makes it easy. Type up all the serial numbers and what rack they sit in, and then add who the rifle is assigned to in another column. It makes it take 5 seconds to find basically anything I need- as well as it's simple and easy to understand for other users.
Also, if a rifle breaks or needs maintenxance, I can highlight a row red or yellow to warn me before I send it out of the armory.
Frankly, mastering excel is one of the absolute best organization skills you can make.