Accounting Tape Calculator makes use of textarea input to mimic tape as calculations are output upwards line by line in a scrolling tape fashion. Also includes memory register operations for storage of values. MR, MS, M+, M*, M- Specify decimal places for rounding. Rounding accommodates for common inaccuracy due to floating point error. Modify UI appearance by changing the comprising HTML. Compatible with the most popular browsers including IE, NS6+, Mozilla browsers (Firefox), Opera.