Number Cruncher
from The Home Computer Advanced Course issue 2, 1984 (month unknown)

The three* programs presented here, for the BBC Microcomputer, Spectrum
and Commodore, accept decimal numbers, and deliver in return their
binary equivalent.

If you input a number with a "+" on the end, for example: 6435+, then
in addition to its decimal and binary representation, its hex
representation will also be displayed.

*obviously I've only sent the Spectrum one.
