Language

Math

MEL Math-Related Commands (abs, sqrt, etc.)
matrixUtil

Strings

MEL String-Related Commands (substr, catenation, etc.)
encodeString
format
sortCaseInsensitive
stringArrayIntersector

Array

Array Manipulation
stringArrayIntersector

Scripting

MEL Scripts
assignCommand
callbacks
commandEcho
condition
connectControl
deleteUI
dimWhen
disable
eval
evalDeferred
isTrue
itemFilter
itemFilterAttr
itemFilterType
lsUI
melOptions
objectTypeUI
optionVar
pause
refresh
renameUI
resourceManager
scriptJob
selectionConnection
setParent
setUITemplate
uiTemplate
waitCursor