QuickBooks is a line of business accounting software developed and marketed by Intuit. wikipedia.org

A data entry clerk, sometimes called a typist, is a member of staff employed to type data into a database using a keyboard. The keyboards used can often have specialist keys and multiple colours to help them in the task and speed up the work. wikipedia.org

Microsoft Excel is a proprietary commercial spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X. It features calculation, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications. wikipedia.org

Accounts receivable also known as Debtors, is money owed to a business by its clients (customers) and shown on its Balance Sheet as an asset. wikipedia.org

Order processing Order processing is a key element of Order fulfillment. Order processing operations or facilities are commonly called "distribution centers".

Bookkeeping is the recording of financial transactions. Transactions include sales, purchases, income, receipts and payments by an individual or organization. Bookkeeping is usually performed by a bookkeeper. wikipedia.org