Science Fiction
Space Opera
Hard
Near Future
Alternate History
Cyberpunk
Fantasy
High
Sword And Sorcery
I will post the list of subgenres with their examples that he posted way back then (of course there will be other examples by now, and possibly other subgenres as well).
SCIENCE FICTION
hard sf = TIMESCAPE, THE FOUNTAINS OF PARADISE
soft sf = THE STARS MY DESTINATION, THE SPACE MERCHANTS
cyberpunk = NEUROMANCER (natch)
steampunk = THE DIGGING LEVIATHAN, THE DIFFERENCE ENGINE
military sf = STARSHIP TROOPERS, THE FOREVER WAR, WAR WORLDS
alternate world sf = WEST OF EDEN, THE MALACIA TAPESTRY, SS/GB
space opera = STAR WARS, PHOENIX IN FLIGHT, THE PRICE OF THE STARS
space fantasy = Darkover, "the Force," Pern, etc...
FANTASY
traditional fantasy = Tolkien
contemporary fantasy = WAR FOR THE OAKS, WIZARD OF THE PIGEONS
sword and sorcery = Conan, Fafhrd and Mouser
heroic fantasy is s&s with more nobility = Feist's Midkemia, Terry Brooks, etc.
dark fantasy (fantasy division) = heroic or contemporary fantasy with horrific elements, such as SOMETHING WICKED THIS WAY COMES, Angus Wells
space fantasy (fantasy division) = a fantasy plot placed in a space opera setting, such as Jack Vance
HORROR
supernatural horror is any horror with magic in it, like SALEM'S LOT
realistic horror is horror =without= magic in it = MISERY, THE SILENCE OF THE LAMBS, etc.
splatterpunk is horror with rock'n'roll sensibilities = John Skipp and Craig Spector, David Schow
dark fantasy (horror division) = horror with grand magical elements, like Lovecraft, Arthur Machen, etc. (though a case could be made that most Lovecraft is actually sf of a sort...)
occult horror = supernatural horror with orthodox occult elements, such as ROSEMARY'S BABY
gothic horror = FRANKENSTEIN, Walpole, DRACULA, Poe
LITERARY FICTION
literary fiction can encompass any of these forms, as long as the intent is to produce important, lasting prose, rather than, or as well as, ephemeral entertainment
ONE HUNDRED YEARS OF SOLITUDE and LITTLE, BIG are examples of both literary fantasy and magic realism
A CLOCKWORK ORANGE and BRAVE NEW WORLD are examples of literary sf
THE TURN OF THE SCREW and most of Kafka are examples of literary horror
<Yes, I know these are radical oversimplifications. It's a dirty job, but someone has to do it...>
I hope his list helps.