| ABORTASK | stops a running task |
| ABOUT | displays lists and information on tasks, verbs, adverbs |
| AIPS | AIPS main program for interactive use |
| AIPSB | AIPS main program for executing batch jobs |
| ANTNAME | A list of antenna (station) names |
| APARM | General numeric array adverb used many places |
| BADDISK | specifies which disks are to be avoided for scratch files |
| BATCHJOB | Information about BATCH |
| BCOUNT | gives beginning location for start of a process |
| BITER | gives beginning point for some iterative process |
| BLC | gives lower-left-corner of selected subimage |
| BPARM | general numeric array adverb used too many places |
| CATEGORY | List of allowed primary keywords in HELP files |
| CLNUP | removes old MS, RL, SG, TG and ?? files from AIPS disks |
| CLRMSG | deletes messages from the user’s message file |
| COMMENT | 64-character comment string |
| CPARM | general numeric array adverb used many places |
| CPUTIME | displays curren tcpu and real time usage of the AIPS task |
| CROWDED | allows a task to perform its function in a crowded fashion |
| DCODE | General string adverb |
| DDISK | Deterimins where input Y2K data are found |
| DDTSIZE | String formerly used by the DDT test |
| DECIMAL | specifies if something is in decimal format |
| DETIME | specifies a time interval for an operation (destroy, batch) |
| DISKU | shows disk use by one or all users |
| DOALL | specifies if an operation is done once or for all matching |
| DOCONFRM | selects user confirmation modes of repetitive operation |
| DOKEEP | specifies if something is kept or deleted |
| DOSCALE | specifies if a scaling operation of some sort is to be performed |
| DOSCAN | specifies if a scan-related operation is to be done |
| DOWAIT | selects wait-for-completion mode for running tasks |
| DOWEIGHT | selects operations with data weights |
| DPARM | General numeric array adverb used many places |
| DRCHK | stand-alone program checks system setup files for consistency |
| ECOUNT | give the highest count or iteration for some process |
| EDGSKP | Deterimins border excluded from comparision or use |
| EHEX | converts decimal to extended hex |
| EXPERT | specifies an user experience level or mode |
| EXPLAIN | displays help + extended information describing a task/symbol |
| FILEZAP | Delete an external file |
| FPARM | General numeric array adverb used in modeling |
| FREESPAC | displays available disk space for AIPS in local system |
| GET | restores previously SAVEd full POPS environment |
| GETDATE | Convert the current date and time to a string |
| GNUGPL | Information about GNU General Public License for AIPS |
| GO | starts a task, detaching it from AIPS or AIPSB |
| GRADDRES | specifies user’s home address for replies to gripes |
| GRDROP | deletes the specified gripe entry |
| GREMAIL | gives user’s e-mail address name for reply to gripe entry |
| GRINDEX | lists users and time of all gripe entries |
| GRIPE | enter a suggestion or bug report for the AIPS programmers |
| GRIPR | standalone program to enter suggestions/complaints to AIPS |
| GRLIST | lists contents of specified gripe entry |
| GRNAME | gives user’s name for reply to gripe entry |
| GRPHONE | specifies phone number to call for questions about a gripe |
| HELP | displays information on tasks, verbs, adverbs |
| HINOTE | adds user-generated lines to the history extension file |
| HITEXT | writes lines from history extension file to text file |
| IN2FILE | specifies name of a disk file, outside the regular catalog |
| INFILE | specifies name of a disk file, outside the regular catalog |
| INTEXT | specifies name of input text file, not in regular catalog |
| IOTAPE | Deterimins which tape drive is used during a Y2K RUN |
| LSAPROPO | Data input to APROPO to find what uses what words |
| MAPDIF | Was used by the DDT test suite |
| MDISK | Determins where input Y2K data are found |
| MSGKILL | turns on/off the recording of messages in the message file |
| MSGSERVER | Information about the X11-based message server |
| MSGSRV | Information about the X11-based message server |
| NBOXES | Number of boxes |
| NCCBOX | Number of clean component boxes |
| NCOUNT | General adverb, usually a count of something |
| NITER | The number of iterations of a process. |
| NPOINTS | General adverb giving the number of something |
| NTHREAD | Controls number of threads used by multi-threaded processes in OBIT |
| OBJECT | The name of an object |
| OFFSET | General adverb, the offset of something. |
| OPCODE | General adverb, defines an operation |
| OPTELL | The operation to be passed to a task by TELL |
| OPTYPE | General adverb, defines a type of operation. |
| ORDER | Adverb used usually to specify the order of polynomial fit |
| OTFBS | Translates on-the-fly continuum SDD format to AIPS UV file |
| OTFUV | Translates on-the-fly single-dish SDD format to AIPS UV file |
| OUTFILE | specifies name of output disk file, not in regular catalog |
| OUTTEXT | specifies name of output text file, not in regular catalog |
| OUTVERS | The output version number of an extension file (table). |
| PANIC | Instructions for what to do when things go wrong |
| PIX2VAL | An image value in the units specified in the header. |
| PIXRANGE | Range of pixel values to display |
| PIXVAL | Value of a pixel |
| POSTSCRIP | General comments about AIPS use of PostScript incl macros |
| PRTAC | prints contents and summaries of the accounting file |
| PRTASK | Task name selected for printed information |
| PRTHI | prints selected contents of the history extension file |
| PRTLIMIT | specifies limits to printing functions |
| PRTMSG | prints selected contents of the user’s message file |
| QUAL | Source qualifier |
| READLINE | Information about AIPS use of the GNU readline library. |
| REBYTE | service program to transform byte order of full data sets |
| REHEX | converts extended hex string to decimal |
| ROTATE | Specifies a rotation |
| RPARM | General numeric array adverb used in modeling |
| RTIME | Task to test compute times |
| SCALR1 | General adverb |
| SCALR2 | General adverb |
| SCALR3 | General adverb |
| SECONDARY | List of allowed secondary keywords in HELP files |
| SECONDRY | List of allowed secondary keywords in HELP files |
| SOURCES | A list of source names |
| SPARM | General string array adverb |
| SRCALIAS | A list of source names, used as an alias |
| SRCNAME | A single source name |
| STALIN | revises history by deleting lines from history extension file |
| STRA1 | General string adverb |
| STRA2 | General string adverb |
| STRA3 | General string adverb |
| STRB1 | General string adverb |
| STRB2 | General string adverb |
| STRB3 | General string adverb |
| STRC1 | General string adverb |
| STRC2 | General string adverb |
| STRC3 | General string adverb |
| SUBARRAY | Subarray number |
| SYMBOL | General adverb, probably defines a plotting symbol type |
| SYS2COM | specifies a command to be sent to the operating system |
| SYSCOM | specifies a command to be sent to the operating system |
| SYSOUT | specifies the output device or file used by the system |
| SYSTEM | Verb to send a command to the operating system |
| TCODE | Deterimins which type of Y2K is RUN. |
| TDISK | Deterimins where output Y2K data is placed |
| TELL | Send parameters to tasks that know to read them on the fly |
| TGREP | finds all user numbers which have used specified task |
| THEDATE | contains the date and time in a string form |
| TIMERANG | Specifies a time range |
| TMASK | Deterimins which tasks are executed when a Y2K is RUN. |
| TMODE | Deterimins which input is used when a Y2K is RUN. |
| TNAMF | Internal variable for Y2K test suite |
| TPMON | Information about the TPMON ”Daemon” |
| VCODE | General string adverb |
| VLBDDT | Verification tests using simulated data |
| VPARM | General numeric array adverb used in modeling |
| WHATSNEW | lists changes and new code in the last several AIPS releases |
| XHELP | Accesses hypertext help system |
| XPARM | General adverb for up to 10 parameters, may refer to X coord |
| XTYPE | X axis (U) convolving function type |
| Y2K | verifies correctness and performance using standard problems |
| Y2KSAVE | verifies correctness and performance using standard problems |
| YINC | Y axis increment |
| YTYPE | Y axis (V) convolving function type |