Atanasoff–Berry computer, an Uncommon card

The card carries these facts from its Wikipedia article.

• The device was limited by the technology of the day.
• The ABC's priority is debated among historians of computer technology, because it was neither programmable, nor Turing-complete.
• Conventionally, the ABC would be considered the first electronic ALU – which is integrated into every modern processor's design.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Atanasoff–Berry computer article was read about 28,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 66 and blocks with 51: each hit it takes is cut by 20 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below Atanasoff–Berry computer in the power ranking, all domains together.