Back in the day when I was still a land surveyor, the HP48GX was hugely popular in the field among staff surveyors because it was so easy to programmatically ex

Back in the day when I was still a land surveyor, the HP48GX was hugely popular in the field among staff surveyors because it was so easy to programmatically extend them or use a COGO card: http://www.hpcalc.org/hp48/science/civil/ http://www.hpcalc.org/hp48/science/civil/