$ScheduledTask (Built-in Mathematica Symbol)

$ScheduledTask returns the current ScheduledTaskObject.

$SoundDisplayFunction (Built-in Mathematica Symbol)

$SoundDisplayFunction gives the default setting for the option DisplayFunction in sound functions.

$SystemWordLength (Built-in Mathematica Symbol)

$SystemWordLength gives the effective number of bits in raw machine words on the computer system where Mathematica is running.

$Version (Built-in Mathematica Symbol)

$Version is a string that gives the version of the Mathematica kernel you are running.

Constrained Optimization (Mathematica Overview)

Introduction Linear Optimization Numerical Nonlinear Local Optimization

Graph Drawing (Mathematica Overview)

Introduction General Graph Drawing Hierarchical Drawing of Directed Graphs

SQLBeginTransaction (DatabaseLink Symbol)

SQLBeginTransaction[conn] initiates an SQL transaction.

SQLCommitTransaction (DatabaseLink Symbol)

SQLCommitTransaction[conn] commits an SQL transaction.

SQLConnections (DatabaseLink Symbol)

SQLConnections[] returns a list of the open SQLConnection objects.

SQLTable (DatabaseLink Symbol)

SQLTable[...] represents a table in an SQL connection.