Wikipedia
Kardex has been the name or part of the name of companies tracing back to Rand Ledger founded in 1898, which were closely associated with the development of the index card as a common business data storage device, and which were also associated with the entities that eventually formed UniSys.
Kardex as a company name was introduced in 1915, subsumed in 1927 (it remained as a brand name and a division name), and revived in 1978. It is currently borne by the Kardex Group, based in Zurich, Switzerland, which makes filing system components as well as many other products for handling materials and information, mostly in physical form.
The term kardex is also a common noun (a genericized trademark), particularly in the medical records field where it is synonymous with Medication Administration Record, especially in Ireland and the United Kingdom.