First calculator with gamma function ? HP or otherwise ?

[Dieter]

(08-18-2017 04:16 PM)Gene Wrote:  ...and page on the Kingspoint SC-60 from 1975 with gamma!

SC60

Quote from that site: "Parmi les fonctions traitées, on trouve notamment la Gamma, la distribution normale 1-Q(X), ..."

I wonder how these functions were calculated. Did the SC-60 really return full-precision results for Gamma resp. the Normal CDF? I remember a Commodore manual from that era (SR-61) which stated error bounds for the normal distribution that match the well-known Hastings approximations, i.e. the inverse was only good for three decimals. Unlike the later HP-32E. ;-)

So how was it done on the SC-60 ?

Dieter