Minicomputer

Minicomputer for converting values, especially of a medicinal nature, between two systems of units, the minicomputer having manually actuatable numeral, letter, function and clearing keys, a computer unit having computing circuits responsive to numeral, function and clearing keys, respectively, a readout or display unit, respectively responsive to actuation of the keys and the computing circuits, and a fixed program memory wherein calculating routines and conversion factors for the calculation and conversion, respectively, between the two systems of units are stored whereby, upon actuation of a function key, one of the stored conversion factors is addressed thereby and entered from the fixed-program memory into a register of the computer unit, the improvement comprising means in the fixed-program memory for storing not only the conversion factors but also dimensions pertaining thereto in the form of letters, an interlinking logic operative upon actuation of a plurality of letter keys for selectively addressing the respective memory locations for the medical conversion factors and the dimensions pertaining thereto, and a call-up unit operative upon actuation of one of the function keys for display of the dimensions to cause the memory to issue the addressed dimension to the display unit.