• IDLanROI
• IDLanROIGroup
• IDLff File Format Classes
• IDLgr Graphics Classes
• IDL_Object
• IDLdbDatabase
• IDLdbRecordset
• IDLitComponent
• IDLitComponent
• IDLitWindow
• IDLnetJPIP
• IDLnetOGCWCS
• IDLnetOGCWMS
• IDLnetURL
• IDL_Integer
• IDL_Number
• IDL_Pointer
• IDL_String
• IDL_Variable
• I18N_MULTIBYTETOUTF8
• I18N_MULTIBYTETOWIDECHAR
• I18N_UTF8TOMULTIBYTE
• I18N_WIDECHARTOMULTIBYTE
• IBETA
• ICONTOUR
• ICONVERTCOORD
• IDELETE
• IDENTITY
• IDLAsync Classes
• IDLDehydrate
• IDLEXBR_ASSISTANT
• IDLHydrate
• IDLITSYS_CREATETOOL
• IDLTaskJob
• IDLUNIT
• IDL_BASE64
• IDL_Container
• IDL_HASHVAR
• IDL_PRIMITIVE
• IDL_VALIDNAME
• IDLml Routines
• IELLIPSE
• IF...THEN...ELSE
• IGAMMA
• IGETCURRENT
• IGETDATA
• IGETID
• IGETPROPERTY
• IIMAGE
• IMAGE
• IMAGE_CONT Procedure
• IMAGE_STATISTICS
• IMAGE_THRESHOLD
• IMAGINARY
• IMAP
• IMSL Advanced Math and Statistics Routines
• INDGEN
• INT_2D
• INT_3D
• INT_TABULATED
• INTARR
• INTERPOL
• INTERPOLATE
• INTERVAL_VOLUME
• INVERT
• IOCTL
• IOPEN
• IPLOT
• IPM
• IPOLYGON
• IPOLYLINE
• IPUTDATA
• IREGISTER
• IRESET
• IRESOLVE
• IROTATE
• IR_FILTER
• ISA
• ISAVE
• ISCALE
• ISETCURRENT
• ISETPROPERTY
• ISHFT
• ISOCONTOUR
• ISOSURFACE
• ISURFACE
• ITEXT
• ITRANSLATE
• IVECTOR
• IVOLUME
• IZOOM