HP-9100A the first ?

[Steve Simpkin]

As far as I know, the first solid state desktop calculator that had transcendental functions was the Mathatronics Mathatron 8-48M introduced in 1964
http://www.oldcalculatormuseum.com/c-math8-48m.html

The Wang tel:320/360/362K series introduced in 1965-1966 also had transcendental functions.
http://www.oldcalculatormuseum.com/wang360.html

The Olivetti Programma 101 introduced in 1965 was programmable with magnetic card storage very much like the HP-9100A.
http://www.oldcalculatormuseum.com/c-programma101.html

These all predate the HP-9100A by 3 years or so.