(1) Motivation & Aims
(2) Caveats with Current Systems
(3) Applicability
(4) Overview of Hubble Sequence
(5) Brief History of the Hubble Sequence
      (a) Revisions by Sandage
      (b) Revisions by deVaucouleurs
(6) Description & Illustration of Types
      (a) Elliptical : E
      (b) Lenticulars : S0
      (c) Spirals
      (d) Irregulars
            (i)   Like Magellanic Clouds
            (ii)  Like M82
      (e) Dwarfs
            (i)   Dwarf Irregulars (dIrr)
            (ii)  Dwarf Ellipticals & Spheroidals (dE/dSph)
            (iii) Compact Ellipticals (cE)
      (f) Peculiars
(7) Relative Frequency of Types
(8) Other Classification Systems/Extensions
      (a) DDO Luminosity Classes
      (b) Elmegreen & Elmegreen Arm Classes
      (c) van den Bergh's "Trifork" Diagram
      (d) Yerkes Concentration Classes
(9) Variation along the Hubble Sequence
(10) Physical Morphology