Wang 700 series Calculator Loading and Executing a Program to Compute Cubic Root Newton-Raphson

Wang 720C desktop calculator (Vintage 1972) loading a program from a cassette tape. The program implements Newton-Raphson algorithm for finding the cubic root of a number, x^1/3.

[Nepermath]

Old machine, but Still amazing, good old time

[Jeffrey]

0:57 The Cubic Root of the number 27 =

[dbranconnier]

That's quite the calculator/computer! :-)

[terrysiuwaiAlive]

Hello, could you mind take some photo about the switch inside the key cap?

[deedee]

I have the originial one, what is its worth? and where can I sell it?

[douro]

Isn't this a logarithmic machine, like the old LOCI-2?