E-4, E-5 and E-6, in the U.S. Navy, in brief

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NCOS.

Last seen on: NY Times Crossword 9 Aug 20, Sunday

Random information on the term “NCOS”:

A network operating system is a specialized operating system for a network device such as a router, switch or firewall.

Historically operating systems with networking capabilities were described as network operating system, because they allowed personal computers (PCs) to participate in computer networks and shared file and printer access within a local area network (LAN). This description of operating systems is now largely historical, as common operating systems include a network stack to support a client–server model.

Early microcomputer operating systems such as CP/M, DOS and classic Mac OS were designed for one user on one computer.[citation needed] Packet switching networks were developed to share hardware resources, such as a mainframe computer, a printer or a large and expensive hard disk. As local area network technology became available, two general approaches to handle sharing of resources on networks arose.[citation needed]

Historically a network operating system was an operating system for a computer which implemented network capabilities. Operating systems with a network stack allowed personal computers to participate in a client-server architecture in which a server enables multiple clients to share resources, such as printers. Early examples of client-server operating systems that were shipped with fully integrated network capabilities are Novell NetWare using the Internetwork Packet Exchange (IPX) network protocol, Windows Server 2003, and Banyan VINES which used a variant of the Xerox Network Systems (XNS) protocols.[citation needed]

NCOS on Wikipedia