sentences:  The Toshiba ""Toscal" BC-1411" electronic calculator, which was introduced in November 1965, used a form of capacitive DRAM (180 bit) built from discrete bipolar memory cells.The same year, Arnold Farber and Eugene Schlig, working for IBM, created a hard-wired memory cell, using a transistor gate and tunnel diode latch.They replaced the latch with two transistors and two resistors, a configuration that became known as the Farber-Schlig cell.