Just like your paper ledger,   we have a Tag list.   It gives you a look at all the "open"  Tags.    Any one can see it and manipulate it as they need,  like having multiple copies of your old ledger.  

When using the system to handle live animals,  the Order list helps you stay on top of "scheduled"  drop offs,  kill and cut days.  When the animals are dropped off for slaughter,  you make Tags.   The Order is closed and each animal now appears on the Tag list along with their Tag#.

When you first see the Tag List it has a lot of information.   You will be able to display Tags to fit your Task and gain access to other related screens.