Sector
Part of speech: noun
Definition: section zone A part of a circle, extending to the center. a fixed-sized unit (traditionally 512 bytes) of sequential data stored on a track of a digital medium (compare to block) An area designated by boundaries within which a unit operates, and for which it is responsible. One of the subdivisions of a coastal frontier. a fictional region of space designated for navigational or governance purposes; for instance, W:Sector (Star Trek), W:List of Star Wars sectors
Domain
Part of speech: noun
Definition: A geographic area owned or controlled by a single person or organization.A sphere of influence.A group of related items, topics, or subjects.The set of all possible mathematical entities (points) where a given function is defined.An open and connected set in some topology. For example, the interval (0,1) as a subset of the real numbers.Any DNS domain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomainsA collection of DNS or DNS-like domain names consisting of a delegated domain name and all its subdomainsA collection of information having to do with a domain, the computers named in the domain, and the network on which the computers named in the domain resideThe collection of computers identified by a domain's domain namesIn the three-domain system, the highest rank in the classification of organisms, above kingdom; in other taxonomic systems, a similarly high rankIn the three-domain system, one of three taxa at that rank: Bacteria, Archaea, or Eukaryota.