• A20 line
  A20 line
  The A20 or addressing line 20 is one of the plethora of electrical lines that make up the system bus of an x86-based computer system. The A20 line in particular is used to transmit the 21st bit on the address bus....
  
  , a microprocessor connection
• British NVC community A20 (Ranunculus peltatus community), a plant community

Vehicles

• A-20 Havoc, a U.S.-designed attack aircraft used in World War II
• A20 heavy tank
  A20 heavy tank
  The A20 heavy tank was a British Harland and Wolff tank which did not enter production but of which a downsized version by Vauxhall Motors became the A22 Churchill tank....
  
  , a British tank which did not enter production but of which a downsized version became the A22 Churchill tank
• A-20 tank, a one of prototypes of Soviet T-34
  T-34
  The T-34 was a Soviet medium tank produced from 1940 to 1958. Although its armour and armament were surpassed by later tanks of the era, it has been often credited as the most effective, efficient and influential design of World War II...
  
   tank
• Aero A.20, a Czech fighter plane
• Arrows A20
  Arrows A20
  The Arrows A20 was the car with which the Arrows Formula One team competed in the 1999 Formula One season. It was driven by Pedro de la Rosa, a Spanish débutant, and Toranosuke Takagi, who moved from the defunct Tyrrell team....
  
  , a race car
• Fiat A.20
  Fiat A.20
  -References:* Angelucci, Enzo. World Encyclopedia of Military Aircraft. London:Jane's Publishing, 1981. ISBN 0-7106-0148-4.* Gunston, Bill. World Encyclopedia of Aero Engines. London:Guild Publishing, 1986....
  
  , an engine powering the 1925 Italian Ansaldo A.120 aircraft
• Focke-Wulf A 20
  Focke-Wulf A 20
  -References:*...
  
  , a 1927 German airliner
• Junkers A 20, a predecessor of the Junkers A 35 aircraft

Others

• A20, another name for the TNFAIP3
  TNFAIP3
  Tumor necrosis factor, alpha-induced protein 3 is a protein that in humans is encoded by the TNFAIP3 gene.-Interactions:TNFAIP3 has been shown to interact with TNIP1, TRAF1, TRAF2, IKBKG, TAX1BP1, YWHAB, YWHAZ, TRAF6 and YWHAH....
  
   human gene or a deubiquitine ligase cut by the paracaspase
  Paracaspase
  Paracaspases are related to caspases present in animals and slime mold, in contrast to metacaspases, which are present in plants, fungi, and "protists"....
  
  
• A20, a code in the Encyclopedia of chess openings for the English Opening
  English Opening
  In chess, the English Opening is the opening where White begins:A flank opening, it is the fourth most popular and, according to various databases, anywhere from one of the two most successful to the fourth most successful of White's twenty possible first moves. White begins the fight for the...
  
  
• A-20, a character in the Japanese .hack//Sign
  .hack//SIGN
  .hack//Sign is an anime television series directed by Kōichi Mashimo and produced by studio Bee Train and Bandai Visual, that makes up one of the four original storylines of the .hack franchise...
  
   anime, whose voice is given by Atsuko Enomoto
  Atsuko Enomoto
  is a Japanese singer and voice actress who works for 81 Produce . Her debut role was Yukino Miyazawa from Kare Kano.-Television animation:*.hack//Roots *.hack//SIGN...
  
  
• A 20, Oshiage Station
  Oshiage Station
  Oshiage Station is a train station located at the Oshiage-eki-mae intersection of Metropolitan Routes 453 and 465 in Sumida, Tokyo, Japan...
  
  code, a train station in Sumida, Tokyo, Japan