Taken from here: http://groups.google.com/group/comp.graphics.apps.gnuplot/browse_thread/thread/52e7cb2703a7b421?fwc=1
... with the suggested edits included.
Set 1:
angles arrow autoscale bars bmargin border boxwidth clabel clip cntrparam colorbox contour datafile decimalsign dgrid3d dummy encoding fit fontpath format
functions function grid hidden3d historysize isosamples key label lmargin loadpath locale logscale mapping margin mouse multiplot mx2tics mxtics my2tics mytics mztics notitle offsets origin output parametric plot pm3d palette pointsize polar print rmargin rrange samples size style surface terminal tics ticslevel ticscale timestamp timefmt title tmargin trange urange variables version view vrange x2data x2dtics x2label x2mtics x2range x2tics x2zeroaxis xdata xdtics xlabel xmtics xrange xtics xzeroaxis y2data y2dtics y2label y2mtics y2range y2tics
y2zeroaxis ydata ydtics ylabel ymtics yrange ytics yzeroaxis zdata zdtics cbdata cbdtics zero zeroaxis zlabel zmtics zrange ztics cblabel cbmtics cbrange cbtics else lower raise refresh screendump smooth via
Set 2:
cd call clear exit help history if load pause using u with w index every smooth thru print pwd quit replot reread reset save set show unset shell splot system test unset update acsplines bezier binary csplines frequency macros matrix object sbeszier table termoption unique xyplane zzeroaxis
Set 3:
abs acos acosh arg asin asinh atan atan2 atanh besj0 besj1 besy0 besy1 ceil cos cosh erf erfc exp floor gamma ibeta inverf igamma imag invnorm int lambertw lgamma log log10 norm rand real sgn sin sinh sqrt tan tanh column defined m_hour
tm_mday tm_min tm_mon tm_sec tm_wday tm_yday tm_year valid exists gprintf sprintf stringcolumn strlen strstrt substr system word words pi
Set 4:
FIT_CONVERGED FIT_LAMBDA_FACTOR FIT_LIMIT FIT_LOG FIT_MAXITER FIT_NDF FIT_SCRIPT FIT_START_LAMBDA FIT_STDFIT FIT_WSSR GNUTERM MOUSE_ALT MOUSE_BUTTON MOUSE_CHAR MOUSE_CTRL MOUSE_KEY MOUSE_SHIFT MOUSE_X MOUSE_X2 MOUSE_Y MOUSE_Y2 GPVAL_CB_LOG GPVAL_CB_MAX GPVAL_CB_MIN GPVAL_CB_REVERSE GPVAL_COMPILE_OPTIONS GPVAL_LAST_PLOT GPVAL_MULTIPLOT GPVAL_OUTPUT GPVAL_PATCHLEVEL GPVAL_PLOT GPVAL_SPLOT GPVAL_TERM GPVAL_TERMOPTIONS GPVAL_T_LOG GPVAL_T_MAX GPVAL_T_MIN GPVAL_T_REVERSE GPVAL_U_LOG GPVAL_U_MAX GPVAL_U_MIN GPVAL_U_REVERSE GPVAL_VERSION GPVAL_VIEW_MAP GPVAL_VIEW_ROT_X GPVAL_VIEW_ROT_Z GPVAL_VIEW_SCALE GPVAL_VIEW_ZSCALE GPVAL_V_LOG GPVAL_V_MAX GPVAL_V_MIN GPVAL_V_REVERSE GPVAL_X2_LOG GPVAL_X2_MAX GPVAL_X2_MIN GPVAL_X2_REVERSE GPVAL_X_LOG GPVAL_X_MAX GPVAL_X_MIN GPVAL_X_REVERSE GPVAL_Y2_LOG GPVAL_Y2_MAX GPVAL_Y2_MIN GPVAL_Y2_REVERSE GPVAL_Y_LOG GPVAL_Y_MAX GPVAL_Y_MIN GPVAL_Y_REVERSE GPVAL_Z_LOG GPVAL_Z_MAX GPVAL_Z_MIN GPVAL_Z_REVERSE GPVAL_TERMINALS
