Atari Calculator#
the Atari Calculator is an advanced programmable calculator that supports both RPN and ALG arithmetic.
Disk Image: Atari Calculator/Calculator.atr
Handbook: Atari Calculator/Atari_Calculator_Manual_Optimized.pdf
original Handbook scan (117 MB): http://strotmann.de/~cas/download/atari/Atari_Calculator_Manual_Original.pdf.gz