HP-9100A the first ?

[Thomas Klemm]

(04-13-2014 10:51 PM)Steve Simpkin Wrote:  The Wang tel:320/360/362K series introduced in 1965-1966 also had transcendental functions.
http://www.oldcalculatormuseum.com/wang360.html

Quote:Wang invented a combination of digital electronic circuits (patented in 1968) that used a method called "factor combining" to generate the base e logarithm of any number.

Other sources claim that "logic circuits requiring fewer than 300 transistors" were used.

Does anybody know how this worked?

Thanks in advance
Thomas