Android 4.x may refer to:

• Android Ice Cream Sandwich (4.0 – 4.0.4)
• Android Jelly Bean (4.1 – 4.3.1)
• Android KitKat (4.4 – 4.4.4)

• Bulgarian Cabinet (85)
• Bulgarian Cabinet (86)
• Bulgarian Cabinet (87)
• Bulgarian Cabinet (88)
• Bulgarian Cabinet (89)
• Bulgarian Chess Federation
• Bulgarian Children's Chorus and School Gergana
• Bulgarian Children's Chorus and School Gergana, New York
• Bulgarian Civil Aviation Administration
• Bulgarian Connection
• Bulgarian Constituent Assembly election 1879
• Bulgarian Constitutional Assembly election 1893
• Bulgarian Constitutional Assembly election 1946
• Bulgarian Constitutional Assembly election 1990
• Bulgarian coup d'etat attempt of 1965
• Bulgarian coup d'état, 1934
• Bulgarian crisis
• Bulgarian Crisis
• Bulgarian Crisis (1885-1888)
• Bulgarian Crisis (1885–1888)
• Bulgarian Cup (ice hockey)
• Bulgarian Deposit Insurance Fund
• Bulgarian Development Bank
• Bulgarian Edict
• Bulgarian Education and Culture and Slavonic Literature Day