ABC

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 * The Atanasoff-Berry Computer(ABC) was designed by John Vincent Atanasoff and Clifford Berry of Iowa state college.
 * The machine was created solely to solve linear equations.
 * Atanasoft and Berry made a prototype in late 1939 with a grant of $650 and received $5000 from the Research Corporation of New York City to finish the machine.
 * The system included boolean logic and binary to solve linear equations.
 * It could solve up to 2 linear equations simeltaneously with up to 29 variables.
 * It weighed over 700 pounds and was about the size of a desk.
 * The original was disassembled when Iowa state college decided to put classrooms in the basement.
 * A working replica was made and is currently in the Durham Center for Computation and Communication at Iowa State University.
 * Ruled to be the first computer by the U.S. District court.\