 Looking at the Sol-20 from the front, where the operator would sit, the keyboard was in a typical location with the main QWERTY-style layout on the left and the numeric keypad on the right.The wooden sides of the case were close on either side of the keyboard, potentially interfering with the operator's hands.On the rear right of the case (as seen from the front), directly to the rear of the numeric keypad, was the power supply, which also provided a fan to cool the circuitry.