Two more demos have been added:
e_500 computes the Euler constant, e, to 500 digits, using the BigInteger data type built into ND1.
FibTri400 computes and displays a picture of the first 400 Fibonacci numbers, stacked atop each other right-aligned. A peculiar pattern of triangles can be seen. This demo, too, uses the BigInteger data type to compute the numbers.