NOS (operating system)
| Industry | Computer hardware and software |
|---|---|
| Founded | 1957 |
| Products | NOS (Network Operating System) |
NOS (Network Operating System) was an operating system with time-sharing functionality, created by Control Data Corporation in 1975, and is now obsolete.
Designed for the 60-bit CDC 6000 series mainframe computers and their successors, NOS replaced the earlier CDC Kronos OS. CDC positioned NOS as the exclusive operating system for all its hardware platforms. In the mid-1980s, NOS was succeeded by NOS/VE, which ran on the 64-bit Cyber-180 systems.
Version 1 of NOS was supported with updates until approximately 1981; subsequently, NOS version 2 was introduced in early 1982.
Time-sharing commands
- ACCESS – selects the access subsystem
- APL – activates the APL environment
- ASCII – switches to 128-character ASCII mode
- ATTACH – connects to a permanent file
- AUTO – automatically generates five-digit line numbers
- BASIC – launches the BASIC interpreter
- BATCH – selects batch processing system
- BEGIN – initiates CCL procedure execution
- BINARY – enables binary input mode
- BRIEF – suppresses header output
- BYE – logs off the user
- CALL – starts KCL procedure execution
- CATLIST – displays a list of user's permanent files
- CHANGE – alters parameters of a permanent file
- CHARGE – assigns charge and project numbers
- CLEAR – releases all locally held files
- CONVERT – translates character sets
- (CR) – queries terminal status if first command on line
- CSET – chooses terminal character-set mode
- DAYFILE – lists records of user activity
- DEBUG – turns CYBER interactive Debug on or off
- DEFINE – creates a direct-access permanent file
- DIAL – sends a one-line message to another terminal
- EDIT – opens text editor
- ENQUIRE – requests current job status information
- EXECUTE – selects Execute subsystem
- FORTRAN – chooses FORTRAN subsystem (FORTRAN 5)
- FTNTS – selects CDC-enhanced FORTRAN Extended Version 4 compiler
- FULL – enables full-duplex communication mode
- GET – copies a permanent file
- GOODBYE – equivalent to BYE command
- HALF – disables full-duplex mode
- HELLO – logs out and initiates login sequence
- HELP – shows descriptions of NOS commands
- LENGTH – requests length of a file
- LIB – copies a permanent file
- LIMITS – displays user limit settings
- LIST – outputs contents of a file
- LNH – lists contents without headers
- LOGIN / LOGOUT – correspond to HELLO / BYE respectively
- MONITOR – connects to a terminal session
- NEW – creates a new primary file
- NORMAL – resets modes set by ASCII, AUTO, BRIEF, NOSORT, CSET, PARITY, TAPE commands
- NOSORT – disables sorting of primary file on next command
- NULL – selects null subsystem
- OLD – copies a permanent file
- P – proceed with command
- PACK – compresses multiple logical records into one record
- PACKNAM – directs file requests to auxiliary device
- PARITY – configures terminal parity
- PASSWOR – changes user's password
- PERMIT – grants another user access permission to a file
- PRIMARY – promotes temporary file to new primary file
- PURGE – removes permanent files
- RECOVER – resumes session after disconnection
- RENAME – changes name of a file
- REPLACE – overwrites permanent file with temporary file contents
- RESEQ – resequences or adds line numbers to primary file
- SAVE – permanently saves a file
- SETASL – sets SRU account block limit (SRU = System Resource Unit on hard drive)
- SETTL – configures CPU time limit
- SORT – sorts primary file contents
- STATUS – same function as ENQUIRE
- STOP – terminates running programs
- SUBMIT – submits batch job deck image for processing
- TRAN – selects NOS transaction subsystem
- USER – displays terminal number information
- X – executes time-sharing command as batch command
- XEDIT – launches XEDIT text editor
Adapted from NOS Version 1 Terminal User's Instant Manual, CDC, 1975–1980.