Adult Vocals, not edgy, mature, easy listening
Alt-Country Americana, twangy, country a bit to the left, not on radio
Alt-Rock Rock that pushes the envelope, quirky, not on radio
Blues All blues including acoustic, electric and all regional styles
Bluegrass Traditional hillbilly, mountain, acoustic instruments, no drums.
Classical All styles including opera
Compilation Mix on artists and/or styles 
Country-New Pop country from 80's on
Country-Traditional Traditional country western up to 70's, & modern styles like that
Dance Music made for club dancing
Easy Listening Vocal or instrumental soft music and soft rock
Electronic EDM and some dance, electronica
Ethnic All non US or British music except Latino
Folk Acoustic music with or without a message 
Funk Bass heavy, strong groove, bands of all sizes types
Gospel Any religious music, christian, traditional gospel all music styles
HaHa Comedy
Holiday All holidays
Jazz All jazz, big band styles from all eras
Kid Kid music or music specifically made for kids
Latino All Hispanic music and styles
Metal All metal styles, hard rock, heavy
Nature Nature sounds with or without music backing
New Age Very light classical, inspirational, airy, Windham Hill
Pop Music made to for the MOR, the masses
Punk Rock with attitude, fast, aggressive
R&B Rhythm and blues
Rap Hip Hop All rap and hip hop styles
Reggae All island, reggae, ska, dub music
Rock General catch all of rock music
Rock 50 1950 specific
Rock 60 1960 specific
Rock 70 1970 specific
Rock 80 1980 specific
Rock 90 1990 specific
Rockabilly Twangy, country rock
Soundtrack Music, TV and Broadway
SpokenWord Non-comedy oral recordings
Top 40 Music made specifically for radio play and sales