Medium-Sized Company   Companies with fewer than 1000 employees. Merchant Bank   When a credit card authorization is processed, the first stop is the bank where the online store has a merchant account. This bank is the merchant's bank. Micropayments   E-commerce began with purchases paid by credit card - roughly $10 and higher. New Micropayment systems allow for purchases ranges anywhere from a fraction of a cent to $5. Modules   Stand-alone software applications that manage a specific business function--for example, Payroll. Modules can be integrated with other modules to form a complete enterprise business process solution--for example, Human Resources Management. Multitasking   A Multitasking operating system is one, which allows a PC to perform more than one task at a time. There are several types of multitasking. Different types include context switching (only the foreground applications uses the processor), cooperative multitasking (background tasks use the processor during idle times), and time-slice multitasking (each task uses the processor's for a fraction of a second).