More specifically,
OrgName: The Legal name of the the registrant for this address block.
NetRange: The range of addreses for that address block.
CIDR: The CIDR number describing the size for each basic network segment in the allocated range.
NetName: The network block name (chosen by the registrant I think).
NetHandle: The unique name (handle) with which the registration entry of that block is identified and organized within the whois database. The name "NET-70-84-0-0-1" shows that this is the first allocated block in the 70.84.x.x space.
Parent: For easier management the allocation entries are broken into levels for easier management within the database. In this case the zone with NetHandle "NET-70-0-0-0-0" logically contains all the alocations with NetHandle "NET-70-x-x-x-x".
NetType: Basically how this network block came to be allocated to the specific registrant. Direct Allocation plainly means that the registrant made an application for an address range to the proper sub-authority of IANA (i.e. ARIN), and was given a space that was previously free. There are certain possible nettypes, like "Direct Assignment", "Reassigned", "Reallocated", "IANA Special Use" and "IANA Reserved". This is related only to what predefined procedure was followed for the allocation of the specific address block (a purely internal organizational matter of IANA, so that allocations can submit to different policy rules). In IPv4 especially, it is important to avoid chaos because of the limited number of addresses.
Perhaps my descriptions are not completely accurate, the official ones should be somewhere in
IANA
's site.
PS. just a clarification, the result of this whois query doesn't show all the address ranges (blocks) a company owns, just how big is the block that the address you queried for belongs to, and what entity it is registered to.