- American Bowling Congress
- service mark for American Broadcasting Company
- The alphabet: learned her ABCs when she was three years old.
- The rudiments of reading and writing.
- The rudiments of a subject: taught the ABCs of geometry.
- (US, usually plural only, uncountable) The alphabet. [First attested from around (1150 to 1350).]
- Do you know your ABCs?
- The fundamentals of any subject. [First attested in the mid 16th century.]
- the ABC of finance
- (UK, rail transport) A British alphabetized guidebook for trains and their stations.
The first three letters of the Latin alphabet, standing for the whole alphabet
abc - Computer Definition
(Atanasoff-Berry Computer) The first electronic digital computer. Completed in 1942 by Iowa State Professor John Atanasoff and graduate student Clifford Berry, it employed many of the principles of future computers. For example, although physically in the form of rotating drums, its memory used capacitors that were constantly being recharged like today's dynamic RAM (see DRAM). The ABC used a standard IBM card reader for input and an odometer-like device for output. For interim storage, Atanasoff devised a binary punch and reader that could very quickly store 1,500 bits on paper sheets by electrostatically burning holes in them. The ABC could solve 29 linear equations with 29 unknowns in one 24-hour day, a marvel for its time. It Took Years for Recognition John Mauchly, cobuilder of the ENIAC, began corresponding with Atanasoff in 1940 and visited him in 1941. Although Eckert and Mauchly's machine gained international attention, Atanasoff was not recognized until years later. A 1973 court overturned an ENIAC patent, stating that the basic ideas of the modern computer came from Atanasoff. Some 17 years later at the age of 87, he was finally honored by receiving the National Medal of Technology. In 1994, an Iowa State University team started building a replica of the ABC. It took three years to complete, but worked exactly as it was supposed to.