pmaCalc combines a scientific calculator, binary arithmetik for programmers, and unit converter in an interesting package. In addition to a fair range of scientific functions, it has an unusual numeric stack, and a binary mode that supports decimal, hexadecimal, octal, and binary arithmetic, with a full complement of logical operators and bit manipulation instructions. It has7 lines: hex, oct, dec, bin, ascii, 2`s compl. and roman. Each line is clickable for new data input.