MINIATURE ELECTRONIC COMPUTER

PURPOSE:To simplify the operation of a key, by obtaining an unknown quantity with just a key input of equations which is performed in accordance with the order of members. CONSTITUTION:A microinstruction given from a control part 3 is fed to an RAM4, and a numerical data is given to an arithmetic circuit 6. An input part 1 contains a register key, an operation key and an unknown quantity key. The cumulative value of each of the coefficient value and constant value of the unknown quantity is stored in a buffer 9 for an equation which is fed by means of the keys of the part 1. After the equation is fed through the part 1, the circuit 6 calculates an unknown quantity from the cumulative value of each of the coefficient value and constant value of the unknown quantity of the equation. The result of the calculation is displayed at a display part 2.