Put another way, a ton of gravel will occupy far less space than a ton of Styrofoam.   Crushed stone, for example, has a density of 100 pounds per cubic foot (lb/ft3), which is 1600 kilograms per cubic meter (kg/m3), which is 1.6 metric tons per cubic meter.
HPSS is software that manages petabytes of data on disk and robotic tape libraries. HPSS provides highly flexible and scalable hierarchical storage management that keeps recently used data on disk and less recently used data on tape.
What is EBS? EBS is an acronym for Educational Broadband Service. And, Educational Broadband Service is the nomenclature that was established in 2005 by the FCC to be used to identify a band of frequencies/spectrum that were formerly known as the Instructional Television Fixed Service (ITFS).