List of reserved words
Some words are used and reserved only for IMS™ commands.
The following table is a list of words that cannot be used to name resources such as transactions or databases. The words listed in this table are used and reserved only for IMS commands.
| A | ABDUMP | ABORT | ACCESS |
| ACT | ACTIV | ACTIVATE | ACTIVE |
| ADDS | ADS | AFF | AFFIN |
| AFFINITY | AFTER | AOITKN | APDB |
| APMQ | AOITOKEN | ALL | ALLENTRIES |
| ALLENT | ALLOC | ALLOCATE | ALLOCF |
| ALLOCS | APPC | ARCHIVE | AREA |
| ASMT | ASR | ASSIGN | ASSIGNMENT |
| AUTO | AUTOARC | AUTOARCH | AUTOLOGON |
| AUTOLGN | AUTOSR | BACKOUT | BACKUP |
| BALG | BALGRP | BKERR | BLDQ |
| BLDQS | BROADCAST | BU | BUILDQ |
| BUILDQS | C1INOP | C2INOP | C3INOP |
| C4INOP | CAGROUP | CAGRP | CANCEL |
| CC | CCTL | CHANGE | CHECKPOINT |
| CHECKPT | CHKPOINT | CHKPT | CHNGS |
| CLASS | CLS | CLSDST | CMDAUTH |
| CMDAUTHE | CNS | COLDB | COLDBASE |
| COLDC | COLDCOMM | COLDS | COLDSESS |
| COLDSYS | COMMIT | COMP | COMPINOP |
| COMPONENT | COMPT | CON | CONT |
| CONTINUOUS | CONV | CONVACT | CONVERSATION |
| CONVHLD | CPRI | CQCHKPT | CQQUERY |
| CPLOG | CQC | CQQ | CQS |
| CQSET | CRD | DATABASE | DATABASES |
| DATAGROUP | DATAGRP | DB | DBALLOC |
| DBD | DBDS | DBDSGRP | DBDUMP |
| DBR | DBRECOVERY | DBS | DC |
| DEACT | DEADQ | DELETE | DELS |
| DEQUEUE | DESC | DESCRIPTOR | DL/I |
| DLOG | DIS | DISP | DISPLAY |
| DIR | DIRECTORY | DMS | DONE |
| DUMPQ | DUMPQS | EEQE | EMHQ |
| END | ERESTART | ERRORCONT | EXCL |
| EXCLUSIVE | EXIT | EXTRACE | FAST |
| FDR | FIRST | FMS | FMT |
| FOR | FORC | FORCE | FORCES |
| FORCSESS | FORMAT | FPPROG | FPREGION |
| FPRGN | FPV | FPVIRTUAL | FREEZE |
| GLOBAL | GRS | GRSN | GRSNAME |
| HOLD | HOTSTANDBY | HSB | HSSP |
| IAM | IC | ICOMPONENT | ICOMPT |
| ID | IDCO | IDLE | IND |
| INDOUBT | INOP | INPUT | INQONLY |
| INT | INTERVAL | INTV | IOVF |
| ISOLOG | JBN | JOB | JOBNAME |
| KEY | LA | LATC | LCT |
| LEAVEGR | LEVEL | LGND | LINE |
| LINES | LINK | LMCT | LOC |
| LOCAL | LOCK | LOG | LOGOND |
| LOOPTEST | LOPEN | LOST | LPRI |
| LRTT | LTERM | LTERMS | LU |
| LUMI | LUN | LUNAME | MADSIOT |
| MASTER | MAXRGN | MESSAGE | MFST |
| MFSTEST | MODE | MODETABLE | MODETBL |
| MODIFY | MODS | MODULE | MON |
| MONITOR | MSASSIGN | MSDB | MSDBLOAD |
| MSG | MSGAGE | MSGREG | MSGREGION |
| MSGREGIONS | MSGREGS | MSNAME | MSPLINK |
| MSVERIFY | MULTSIGN | NBLDQ | NOBACKOUT |
| NOBKO | NOBLDQ | NOBMP | NOBUILDQ |
| NOCHECK | NOCMDAUTH | NOCMDAUTHE | NOCOMP |
| NODBALLOC | NODE | NOFEOV | NOIN |
| NONE | NOOUT | NOPASSWORD | NOPFA |
| NOPSWD | NOQUEUE | NOREVERSE | NOS |
| NOSAVE | NOSHUT | NOTER | NOTERM |
| NOTERMINAL | NOTINIT | NOTOPEN | NOTRANAUTH |
| NOTRANCMDS | NOTRDY | NOUSER | NPRI |
| NRESTART | OASN | OFF | OFFLINE |
| OFR | OLDS | OLREORG | ON |
| OPNDST | OPTION | OSAMGTF | OTMA |
| OTMT | OUTPUT | OVER | OVERFLOWQ |
| OVERRIDE | OVFLWQ | PAGE | PARLIM |
| PASSWORD | PASSWORDS | PCH | PDS |
| PGM | PGMS | PI | PITR |
| PLCT | PLMCT | POOL | PREL |
| PREO | PREPARE | PRI | PRIMARY |
| PRIORITY | PRK | PROG | PROGRAM |
| PROGRAMS | PROGS | PRST | PRT |
| PRTKN | PRTY | PSB | PSS |
| PSTOP | PSTOPPED | PSWD | PSWDS |
| PTERM | PTERMS | PUR | PURGE |
| PURGE1 | Q | QCNT | QMGR |
| QRTT | QS | QUEUE | QUEUES |
| QUI | QUIESCE | RCLSDST | RCOMPT |
| RCS | RCVTIME | RCVTOKEN | RDISPLAY |
| RDR | READNUM | READY | RECOVERY |
| RECOVGRP | REG | REGION | REGIONS |
| REGS | RELEASE | RELREQ | REMOTE |
| REMOVE | RESET | RESP | RESPINP |
| RESYNC | RETR | RMCHANGE | RMDELETE |
| RMGENJCL | RMINIT | RMLIST | RMNOTIFY |
| RSTART | RTAKEOVER | RTC | RTCODE |
| SAVE | SB | SCHD | SEC |
| SECURE | SECURITY | SEGNO | SEGSIZE |
| SEGSZ | SERVGRP | SET | SG |
| SHAREDQ | SHRQ | SHUT | SHUTDOWN |
| SIDE | SIGN | SIMLOGON | SINGLE |
| SMCOPY | SNAPQ | SNGL | SNGLSIGN |
| SQTT | SSM | SSR | STAGLOBAL |
| STALOCAL | STA | START | STATIC |
| STATISTICS | STATUS | STO | STOP |
| STOPPED | STRG | STRUC | STRUCTURE |
| SUB | SUBS | SUBPOOL | SUBSYS |
| SUBSYSMEMBER | SUBSYSTEM | SUBSYSTEMS | SUR |
| SURV | SURVEIL | SURVEILLANCE | SUSPEND |
| SWITCH | SYNC | SYNCLEVEL | SYNCLV |
| SYNCSESS | SYSID | SYSTEM | TABLE |
| TAKEOVER | TCO | TDS | TER |
| TERM | TERMINAL | TERMINALS | TERMINATE |
| TERMS | TERS | TEST | THREAD |
| TIMEOUT | TIMEOVER | TIMO | TKO |
| TKOTRA | TKOVR | TMEM | TMEMBER |
| TO | TP | TPI | TPIPE |
| TPN | TPNAME | TRA | TRACE |
| TRACKING | TRACKING STATUS | TRAN | TRANAUTH |
| TRANCMDS | TRANCODE | TRANCODES | TRANS |
| TRANSACTION | TRANSACTIONS | TRAP | TRKARCH |
| TRKAUTOARCH | TRS | TYPE | UDATA |
| UDS | UNITYPE | UNL | UNLOCK |
| UNPLAN | UOR | USEDBDS | USER |
| USERD | USRD | VERIFY | VGR |
| VGRS | VID | VIR | VOLUME |
| VPL | VTAMPOOL | VUNLOAD | WADS |
| WPM1 | WPM2 | WPM3 | XKEY |
| XTRC | XTRACE |