nb2 = NotebookOpen @ FileNameJoin[
{$InstallationDirectory, "SystemFiles", "FrontEnd", "StyleSheets", "Core.nb"}];
Note that some of the named styles in the core stylesheet styles are empty, i.e. the style name is defined but no styles set:
Cell[StyleData["style"]]
For example (with V8):
Union[Cases[NotebookGet[nb2],StyleData[x_, ___] :> x, \[Infinity]]] // Length
(* 526 *)
Union[Cases[NotebookGet[nb2],Cell[StyleData[x_, ___], __] :> x, \[Infinity]]] // Length
(* 477 *)
Those style names with some style settings defined are (note the repeated All
at the start of the output list due to the style environment names. You can modify if you wanted to use this programmatically in some way):
styles=Union[Cases[NotebookGet[nb2], Cell[StyleData[x_,___], __] :> x, \[Infinity]]]
(* {"Abs", "ActionMenu", "ActionMenuLabel", "AddOnsLink", \
"AddOnsLinkText", "AiryAi", "AiryAiPrime", "AiryBi", "AiryBiPrime", \
"AngerJ", "AngerJ2", "AppellF1", "ArithmeticGeometricMean", "Assert", \
"AugmentedSymmetricPolynomial", "AugmentedSymmetricPolynomialList", \
"BarnesG", "BellB", "BellB2", "BernoulliB", "BernoulliB2", \
"BernsteinBasis", "BesselI", "BesselJ", "BesselJZero", "BesselK", \
"BesselY", "BesselYZero", "Beta", "Beta3", "Beta4", \
"BetaRegularized", "BetaRegularized4", "BF", "Binomial", "Bra", \
"BraKet", "BSplineBasis", "BSplineBasis3", "BSplineBasis4", "Button", \
"CalculateInput", "CalculatePrompt", "CardinalBSplineBasis", \
"CarmichaelLambda", "CatalanNumber", "Ceiling", "CellExpression", \
"CellInsertionMenu", "CellInsertionMenuShortcut", "CellLabel", \
"CentralMoment", "CentralMomentList", "ChampernowneNumber", \
"Citation", "Code", "Column", "CompatibilityControls", \
"CompatibilityDocked1", "CompatibilityDocked2", "CompatibilityInput", \
"CompatibilityInputTop", "CompatibilityText", "CompatibilityTextTop", \
"ConditionedIntegrate", "ConditionedLimit", "ConditionedList", \
"ConditionedListWithAttributes", "ConditionedMax", "ConditionedMin", \
"ConditionedProduct", "ConditionedSet", \
"ConditionedSetWithAttributes", "ConditionedSum", "Conjugate", \
"ConjugateTranspose", "ControlStyle", "CoordinateTooltipLabel", \
"CopyEvaluate", "CopyEvaluateCell", "CoshIntegral", "CosIntegral", \
"Cumulant", "CumulantList", "Cyclotomic", "DawsonF", "DedekindEta", \
"DemosLink", "Deploy", "Det", "DialogStyle", "DialogText", \
"DifferenceDelta2", "DifferenceDelta3", "DifferenceDelta4", \
"DiracDeltaSeq", "DirichletCharacter", "DirichletL", \
"DiscreteDeltaSeq", "DiscreteRatio2", "DiscreteRatio3", \
"DiscreteRatio4", "DiscreteShift2", "DiscreteShift3", \
"DiscreteShift4", "DivisorSigma", "DockedCell", "DockedTitleCell", \
"DomainIntegrate", "DomainProduct", "DomainSum", "EllipticE", \
"EllipticE2", "EllipticF", "EllipticK", "EllipticNomeQ", \
"EllipticPi", "EllipticPi3", "EllipticTheta", "EllipticThetaPrime", \
"EulerE", "EulerE2", "EulerPhi", "Evaluate", "EvaluateCell", \
"EvaluationMarker", "ExpIntegralE", "ExpIntegralEi", \
"FactorialMoment", "FactorialMomentList", "FactorialPower", \
"FactorialPower3", "Fibonacci", "Fibonacci2", "FieldHintStyle", \
"Floor", "Footer", "FooterSection", "FooterSubsection", \
"FooterTitle", "FrameLabel", "FresnelC", "FresnelS", \
"FunctionTemplate", "FunctionTemplateArgument", \
"FunctionTemplateHighlight", "Gamma", "Gamma2", "Gamma3", \
"GammaRegularized", "GammaRegularized3", "GeneralizedPlaceholder", \
"GenericButton", "GenericLink", "GettingStartedLink", "Graphics", \
"Graphics3D", "Grid", "Gudermannian", "HankelH1", "HankelH2", \
"HarmonicNumber", "HarmonicNumber2", "Haversine", "Header", \
"HeaderSection", "HeaderSubsection", "HeaderTitle", \
"HeavisideLambdaSeq", "HeavisidePiSeq", "HeavisideThetaSeq", \
"HideContentsInPrint", "HistoryCurrentPage", "HurwitzLerchPhi", \
"HurwitzZeta", "Hypergeometric0F1", "Hypergeometric0F1Regularized", \
"Hypergeometric1F1", "Hypergeometric1F1Regularized", \
"Hypergeometric2F1", "Hypergeometric2F1Regularized", \
"HypergeometricU", "Hyperlink", "HyperlinkActive", "ImageGraphics", \
"Inert", "InfoCell", "InfoGrid", "InfoHeading", "InformationCell", \
"InformationLink", "InformationLinkLF", "InlineCell", \
"InlineCellEditing", "InlineOutput", "Input", "InputField", \
"InputForm", "InputOnly", "InsetString", "IntervalClosed", \
"IntervalClosedOpen", "IntervalOpen", "IntervalOpenClosed", \
"Inverse", "InverseBetaRegularized", "InverseBetaRegularized4", \
"InverseEllipticNomeQ", "InverseGammaRegularized", \
"InverseGammaRegularized3", "InverseGudermannian", \
"InverseHaversine", "InverseJacobiCD", "InverseJacobiCN", \
"InverseJacobiCS", "InverseJacobiDC", "InverseJacobiDN", \
"InverseJacobiDS", "InverseJacobiNC", "InverseJacobiND", \
"InverseJacobiNS", "InverseJacobiSC", "InverseJacobiSD", \
"InverseJacobiSN", "InverseWeierstrassP", "InverseWeierstrassP4", \
"IT", "ItemizedPicture", "JacobiAmplitude", "JacobiCD", "JacobiCN", \
"JacobiCS", "JacobiDC", "JacobiDN", "JacobiDS", "JacobiNC", \
"JacobiND", "JacobiNS", "JacobiSC", "JacobiSD", "JacobiSN", \
"JacobiSymbol", "JacobiZeta", "KelvinBei", "KelvinBei2", "KelvinBer", \
"KelvinBer2", "KelvinKei", "KelvinKei2", "KelvinKer", "KelvinKer2", \
"Ket", "KleinInvariantJ", "KroneckerDeltaSeq", "KroneckerSymbol", \
"Label", "Large", "LegendreP", "LegendreP3", "LegendreP4", \
"LegendreQ", "LegendreQ3", "LegendreQ4", "LerchPhi", "Link", \
"LiouvilleLambda", "ListGraphic", "LocatorPane", "LogGamma", \
"LogIntegral", "LucasL", "LucasL2", "MainBookLink", "MainBookLinkMR", \
"MangoldtLambda", "Manipulate", "ManipulateLabel", "Manipulator", \
"MasterIndexLink", "MathCaption", "MathieuCharacteristicA", \
"MathieuCharacteristicB", "MB", "MBO", "Medium", "Menu", "MenuLabel",
"MenuViewLabel", "Message", "MessageLink", "MessagesWindow", \
"MixedFraction", "MO", "Mod", "ModularLambda", "MoebiusMu", "Moment", \
"MomentList", "MR", "MSG", "NetworkEdge", "NetworkGraphics", \
"NetworkVertex", "NevilleThetaC", "NevilleThetaD", "NevilleThetaN", \
"NevilleThetaS", "NorlundB", "NorlundB3", "Norm", "Norm2", \
"NotationMadeBoxesTag", "NotationPatternTag", "NotationTemplateTag", \
"Notebook", "NotebookLink", "NotebookLinkMR", "Notes", "ObjectName", \
"OpenCloseItemizedPicture", "OtherInformationLink", \
"OtherInformationLinkMR", "Output", "OutputForm", "PageBreak", \
"PageLink", "PageNumber", "Pane", "Panel", "PanelLabel", \
"PaneSelector", "ParabolicCylinderD", "PartitionsP", "PartitionsQ", \
"Paste", "Picture", "PictureGroup", "Piecewise", "Placeholder", \
"PluginEmbeddedContent", "PluginEmbeddedWindow", "PluginInfoText", \
"PluginInitWindow", "PluginMainErrorText", "PluginSubErrorText", \
"PluginWindow", "Pochhammer", "PolyGamma", "PolyGamma2", "PolyLog", \
"PolyLog3", "PolynomialMod", "PopupMenu", "PopupMenuLabel", \
"PowerMod", "PowerSymmetricPolynomial", \
"PowerSymmetricPolynomialList", "PreviousNext", "PrimaryPlaceholder", \
"Prime", "PrimeNu", "PrimeOmega", "PrimePi", "PrimeZetaP", "Print", \
"PrintTemporary", "PrintUsage", "QBinomial", "QFactorial", "QGamma", \
"QHypergeometricPFQSeq", "QPochhammer", "QPochhammer1", \
"QPochhammer2", "QPolyGamma", "QPolyGamma3", "RamanujanTau", \
"Reference", "ReferenceMarker", "Residue", "RiemannR", \
"RiemannSiegelTheta", "RiemannSiegelZ", "RM", "RowDefault", \
"RowNoSeparators", "RowWithSeparator", "RowWithSeparators", "SB", \
"SBO", "SelectionPlaceholder", "SinhIntegral", "SinIntegral", \
"SlideHyperlink", "SlidePreviousNextLink", "SlideShowCanvas", \
"SlideShowNavigationBar", "SlideShowNavigationBar2", \
"SlideShowPaletteButton", "SlideShowPaletteTitle", \
"SlideShowSection", "SlideTOC", "SlideTOCLink", "Small", "SO", \
"Sound", "SphericalBesselJ", "SphericalBesselY", "SphericalHankelH1", \
"SphericalHankelH2", "SpheroidalEigenvalue", "SpheroidalPS", \
"SpheroidalPSPrime", "SpheroidalQS", "SpheroidalQSPrime", \
"SpheroidalS1", "SpheroidalS1Prime", "SpheroidalS2", \
"SpheroidalS2Prime", "SquaresR", "SR", "StandardForm", \
"StieltjesGamma", "StieltjesGamma2", "StirlingS1", "StirlingS2", \
"StruveH", "StruveL", "Subsuperscript", "Superscript", \
"TableViewGrid", "TableViewItem", "TableViewItem2", \
"TableViewItemExpression", "TableViewItemExpression2", \
"TableViewLabel", "TableViewPlaceholder", "TableViewStringBoxes", \
"TabView", "TabViewLabel", "TB", "TBI", \
"TemplateBoxErrorDisplayArgumentStyle", \
"TemplateBoxErrorDisplayStyle", "TemplateDockedCell", \
"TemplateHeaderCell", "TemplateLink", "TemplateVariable", "TextForm", \
"TextStyleInputField", "TextStyling", "TI", "TooltipLabel", \
"TourLink", "TR", "TraditionalForm", "Transpose", "UnitBoxSeq", \
"UnitStepSeq", "UnitTriangleSeq", "UnmatchedBracket", "Usage", \
"WeberE", "WeberE2", "WeierstrassP", "WeierstrassPPrime", \
"WeierstrassSigma", "WeierstrassZeta", "WhittakerM", "WhittakerW", \
"WolframAlphaLong", "WolframAlphaShort", "WolframAlphaShortInput", \
"Zeta", "Zeta2", "ZetaZero", All} *)
And to see which of these built-in named styles might be visually useful:
Grid[{Style["The quick brown fox ...", #], Style[#, #]} & /@
Cases[styles, _String], Alignment -> {{Right, Left}, Center}]