Abstract: Systems and techniques for operating on data representing an account include posting an activity record representing account activity. The systems and techniques may involve setting an activity date for an activity having an accounting impact, determining a balance value, setting an accounting impact date, and setting a journal activity date. The balance value may correspond to the net sum of activity for the activity date. The accounting impact date may correspond to the latest accounting impact date among all journals affecting the balance value. The journal activity date may correspond to the latest accounting impact date among all journals affecting the sum of activity for prior processing dates applied on the date. In some cases, the activity record may be posted to a specific period.

Abstract: Apparatus is provided for performing a method for detecting and correcting errors in one clock cycle that occur during arithmetic operations of at least two operands. Specifically, two operands are operated on to obtain a result. The digits of the result are added to one another. This adding step is repeated until a first single digit is achieved. The digits of each of the operands are added to one another to obtain an intermediate sum. The digits of the intermediate sum, in turn, are added to one another. Once again, this operation is repeated until a second single digit is achieved. The first single digit number is compared with the second single digit number and a signal indicative of error is generated if the comparison is unsuccessful.In order to correct the error, the digits of each of the operands are added to one another to obtain an intermediate sum. Sequentially, a digit is subtracted from the partial sum of the remaining digits of each of the operands.