McO 515

Description

Brand:	McO
Model:	515 (026C-515 at the back)
Type:	Scientific calculator
Picture:
Batteries:	AA x 4
Lifetime:	Introduced: 1974? Terminated: unknown
Notes:	Early scientific calculator with 8-digit accuracy and a LED display. The LED display is magnified and to see its big magnified digits one has to look at it from the correct angle. The angle is perfect when the calculator is hand held. It has all the necessary basic scientific functions. It is quite thick, 2.75 centimeters. There is a slider for the angular mode, radians or degrees. The workings of the x^y key might be puzzling to users of this calculator. When you enter a (positive) number and press the x^y key an intermediate result is shown, being the natural log "ln" of the number entered. To obtain its power enter the value for y and press the = key. My guess is that this calculator uses this formula: x^y = e^{(y · ln x)} The DR key repeats the "left part" of the last calculation. The four AA batteries all face the same way.

A 6V DC power adapter.