Compounds of

• ９日
  (n) (1) the ninth day of the month
  (2) nine days
• ＡＣ
  (n) adult children
• ＡＤ
  (n) AD (Anno Domini)
• ＡＩ
  (n) artificial intelligence
  AI
• ＡＯ
  (n) admissions office
  admission office
• ＡＶ
  (n) porn video (from adult video)
• Ａ型
  (n) type A (blood, influenza, hepatitis, etc.)
• Ａ系
  (n,adj-no) (abbr) (sl) Akihabara style
  nerdy
• ＢＣ
  (n) BC (before Christ)
• ＢＤ
  (n) Blu-ray Disc
  BD
• Ｂ型
  (n) type B (blood, influenza, hepatitis, etc.)
• Ｂ系
  (n,adj-no) (sl) hip-hop culture
  Black culture (esp. breakdancing culture)
• Ｂ専
  (n) (sl) attraction to ugly people
• ＣＤ
  (n) (1) compact disk
  CD
  (2) cash dispenser
  (3) (negotiable) certificate of deposit
• ＣＦ
  (n) commercial film
  CF
• ＣＧ
  (n) (comp) computer graphics
  CG
• ＣＭ
  (n) CM
  commercial message
  (P)
• ＣＴ
  (n) (comp) CT (computerized tomography)
• Ｃ型
  (n) type C (hepatitis, etc.)
• ＤＪ
  (n) DJ
  disc jockey
• ＤＬ
  (n) (comp) download
• Ｄ層
  (n) D layer (of the ionosphere)
• ＥＵ
  (n) EU
  European Union
• Ｅ層
  (n) E layer (of the ionosphere)
• ＦＭ
  (n) FM
  frequency modulation
• Ｆ層
  (n) F layer (of the ionosphere)
• ＧＷ
  (n) golden week
• Ｇ様
  (n) (sl) euph. for cockroach
• ＨＰ
  (n) (1) horsepower
  HP
  (2) home page
  (3) half-pipe (i.e. in snowboarding)
  (4) HP (i.e. a 'hit point' in a role-playing game)
• ＨＰ
  (n) (1) horsepower
  HP
  (2) home page
  (3) half-pipe (i.e. in snowboarding)
  (4) HP (i.e. a 'hit point' in a role-playing game)