AbortProtect[expr] evaluates expr, saving any aborts until the evaluation is complete.
AbsoluteCurrentValue[item] gives the absolute current value of item at a location in the Mathematica system and interface. AbsoluteCurrentValue[{item, spec}] gives the ...
AbsoluteDashing[{d_1, d_2, ...}] is a graphics directive which specifies that lines which follow are to be drawn dashed, with successive segments having absolute lengths d_1, ...
AbsoluteFileName["name"] gives the full absolute version of the name for a file in your filesystem.
AbsolutePointSize[d] is a graphics directive which specifies that points which follow are to be shown if possible as circular regions with absolute diameter d.
AbsoluteThickness[d] is a graphics directive which specifies that lines which follow are to be drawn with absolute thickness d.
AbsoluteTime[] gives the total number of seconds since the beginning of January 1, 1900, in your time zone.AbsoluteTime[{y, m, d, h, m, s}] gives the absolute time ...
AbsoluteTiming[expr] evaluates expr, returning a list of the absolute number of seconds in real time that have elapsed, together with the result obtained.
AccountingForm[expr] prints with all numbers in expr given in standard accounting notation. AccountingForm[expr, n] prints with numbers given to n-digit precision.
AccuracyGoal is an option for various numerical operations which specifies how many effective digits of accuracy should be sought in the final result.