| 词条 | NOS/VE | ||||||||||||||||||||||||
| 释义 |
| name = NOS/VE | logo = | screenshot = | caption = | developer = Control Data Corporation | source_model = | kernel_type = | supported_platforms = CDC Cyber 180 series and successors | ui = | family = | released = 1980s | latest_release_version = | latest_release_date = | latest_test_version = | latest_test_date = | marketing_target = Mainframe computers | programmed_in = | prog_language = | language = | updatemodel = | package_manager = | working_state = Historic | license = Proprietary | website = }}NOS/VE (Network Operating System / Virtual Environment) is a discontinued operating system with time-sharing capabilities, written by Control Data Corporation in the 1980s. It is a virtual memory operating system, employing the 64-bit virtual mode of the CDC Cyber 180 series computers. NOS/VE replaced the earlier NOS and NOS/BE operating systems of the 1970s. CommandsThe command shell interface for NOS/VE is called the System Command Language, or SCL for short. In order to be callable from SCL, command programs must declare their parameters; this permits automatic usage summaries, passing of parameters by name or by position, and type checking on the parameter values. All standard NOS/VE commands further follow a particular naming convention, where the form of the command is verb{_adjective}_noun; these commands could be abbreviated with the first three characters of the verb followed by the first character(s) of all further words. Examples:
Inspired by addressing structure-members in various programming languages, the catalog separator is the dot. Subsystems like FTP integrate into the command shell. They change the prompt and add commands like get_file. Thereby statements like flow-control stay the same and subsystems can be mixed in procedures (scripts). ParametersCommands could take parameters such as the create_connection command: crec telnet sd='10.1.2.3' would connect you to IP address 10.1.2.3 with telnet service. See also
External links
3 : CDC operating systems|Discontinued operating systems|Time-sharing operating systems |
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