Decimal Computer is a three decimal digit virtual machine. It contains one hundred cells of memory, fifteen input cards and fifteen output cards. The central processing unit (CPU) contains a three decimal digit accumulator with an associated one decimal digit 'carry bit', a three decimal digit instruction register, and a two decimal digit program counter. It can handle signed-magnitude execution with an additional sign bit, or alternatively, ten's complement execution without the sign bit.
Decimal Computer is currently free to use.