Why reach for a bland, commercially available calculator when you be using a model that employs RPN (Reverse Polish Notation) in its calculations and be a custom build all at the same time? The kid… ...

Revise how to work out the equation of a straight line using coordinates and the gradient, and vice versa. BBC Bitesize Scotland SQA National 5 Maths.

The beloved HP-35, one of the first scientific calculators able to "perform transcendental functions such as trigonometric, logarithmic and exponential functions" with an LED display just received ...