[DonRotolo]

Typical inventory (not catalog) sheets specify:
Name of item
Part number of item
Quantity in stock
Location (where it is)
Source (where to get more)

In a commercial application, you also record the cost.
In a warehouse application, you also record the velocity and lead time.
(Velocity is how fast these 'sell', and lead time is how long it takes to get more)

You can get into a lot more detail, but that'll get you started.