NOS (operating system)

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NOS

Login procedure
Developer	Control Data Corporation
Working state	Historic
Initial release	1975; 50 years ago (1975)
Latest release	NOS 2.8.7 L871 (Y2K fixed)[1]
Marketing target	Mainframe computers
Platforms	CDC 6000 series and successors
License	Proprietary

NOS (Network Operating System) is a discontinued operating system with time-sharing capabilities, written by Control Data Corporation in 1975.^[2]

NOS ran on the

• ACCESS – selects the access subsystem
• APL – selects APL programing language
• ASCII – select fill 128-character ASCII
• ATTACH – links to a permanent file
• AUTO – automatically generate five-digit line numbers
• BASIC – selects BASIC system
• BATCH – selects the batch system
• BEGIN – starts processing of CCL procedure (control language file)
• BINARY – selects binary input mode
• BRIEF – suppresses headers
• BYE – log off the system
• CALL – starts processing KCL procedure file (control language before CCL)
• CATLIST – lists user's permanent files
• CHANGE – changes parameters of a permanent file
• CHARGE – set charge number and project number
• CLEAR – releases all local files
• CONVERT – converts character sets
• (CR) – Carriage Return – requests terminal status if it is the first thing on a line
• CSET – selects the terminal character-set mode
• DAYFILE – lists a record of the user's activity
• DEBUG – activates or terminates CYBER interactive Debug
• DEFINE – create a direct-access permanent file
• DIAL – sends a one-line message to another terminal
• EDIT – Selects the text editor
• ENQUIRE – Requests the current job status
• EXECUTE – selects the Execute subsystem
• FORTRAN – selects the
  FORTRAN
  subsystem (FORTRAN 5)
• FTNTS – Selects the FORTRAN Extended Version 4 compiler (CDC's enhanced version of FORTRAN 4)
• FULL – Selects full-duplex mode
• GET – gets a copy of a permanent file
• GOODBYE – same as BYE
• HALF – clears full-duplex mode
• HELLO – logs out and starts login
• HELP – gets descriptions of NOS commands
• LENGTH – requests the length of a file
• LIB – get a copy of a permanent file
• LIMITS – lists the user's limits
• LIST – lists the contents of a file
• LNH – same as LIST except no headers
• LOGIN – same as HELLO
• LOGOUT – same as BYE
• MONITOR – connects to a terminal
• NEW – creates a new primary file
• NORMAL – clears modes set by ASCII, AUTO, BRIEF, NOSORT, CSET, PARITY, and TAPE
• NOSORT – prevents the system from sorting the primary file on the subsequent command
• NULL – selects the null subsystem.
• OLD – gets a copy of a permanent file
• P – proceed
• PACK – compress a file with several logical records into one logical record
• PACKNAM – direct subsequent file requests to an auxiliary device
• PARITY – set terminal parity
• PASSWOR – change user password
• PERMIT – grants another user permission to access a file
• PRIMARY – makes temporary file the new primary file
• PURGE – removes permanent files
• RECOVER – allows user to resume after terminal was disconnected
• RENAME – changes file name
• REPLACE – replace the contents of a permanent file with a temporary file
• RESEQ – resequence or add line numbers to the primary file
• SAVE – save a file permanently
• SETASL – sets SRU account block limit (SRU = System Resource Unit, on hard drive)
• SETTL – set CPU time limit
• SORT – sort the primary file
• STATUS – same as ENQUIRE
• STOP – terminates currently running programs
• SUBMIT – submit a batch job deck image
• TRAN – select NOS transaction subsystem
• USER – get terminal number
• X – process a time-sharing command as a batch command
• XEDIT – select XEDIT editor

From NOS Version 1 Terminal User's Instant Manual, CDC, 1975–1980.

• CDC Kronos
• CDC SCOPE
• CDC display code