When I worked in an Architectural Office we did following:
On inside cover of binder wrote with sharpie month and year. Sticker on outside of binder sometimes came off.
On outside edge of binder:
at top of binder applied label with year “06” This at a glance lets you see how old binder is.If updated my mfg put new sticker with new date over old sticker.
At bottom of binder applied rectangular label with a 3 line Sharpie listing; division no on top, next line remaining numbers from MF; next line book no. “01”, “02” etc
This keeps all related products together, so person looking up a product either in library or on line can see manufacturers that make related products, [not necessary equal, just related]. If you flle alphabtically by manufacturers name in each Division will not have product grouped together and many younger persons do not know who manufacturers what.
The book number lets you track who has checked out that particular book, also lets you enter in computer the manufacturers name under the MF listing with binder no. When a catalog is out dated, you pitch and red line it in computer. Then reasign number to next manufactuer that send you related product.
Have sign out sheet at end of each row of shelving. Having a sign out sheet in library area does not assure it will be used, but most will comply.
When I had admin help, once a year I would send out letter to manufacture to update their binder.
A binder that had not been updated for 2 years was pulled off shelf discarded, unless I knew we had a specified it on a recent project, then it went under my desk so it would not be used on future projects but if a question came up I still had reference material.
The computer listing my MF number was put on server so it was accesable to all employes, we were on several floors, and at times in 2 or 3 adjacent building.
I also had mfg reps business card taped to inside cover.
Loose, nonbinder products were filed in a 4 drawer file cabinet with swing folders with MF number. It was not keep updated nor used very much.
Now as a indepent spec writer, I file Binders using the MF number, no book number and no computer listing. But do have year if was received.
I now request new or update binder by email. It generally gets results. When I do not receive binder,they are not in my office master.
Loose product data is generally pitched.