Quantum n. : Quantity; amount.

Quantum n. : A definite portion of a manifoldness, limited by a mark or by a boundary.

Example:
Quantum?....................................?

Taxonomy
Quantum, Deduplication, Event Location, data protection, Data Storage Solutions, Symantec, tape, Enterprise Disk, Replication, Quantum News, Direct-to, Capability, VMware, infrastructures, eWeek, Product Review, Storage Networking World, Phoenix, AZ.

Defination from the web:
Supplier of half-inch cartridge tape drives and developer of tape backup and archiving technologies.