DEVELOPS COMPUTER SOFTWARE THAT HAS THE FUNCTIONS OF PROVIDING INTERACTIVE EXAM PRACTICE, IN ORDER TO HELP ITS CUSTOMERS PASS VARIOUS VENDOR COMPUTER CERTIFICATION EXAMS, SUCH AS THOSE DEVELOPED BY COMPTIA (COMPUTING TECHNOLOGY INDUSTRY ASSOCIATION) AND MICROSOFT CORP; THE SOFTWARE DISPLAYS SAMPLE EXAM QUESTIONS AND PRESENTS MULTIPLE ANSWER CHOICES, OF WHICH ONE OR MORE IS THE CORRECT ANSWER; IN MANY OF THE SAMPLE QUESTIONS, AN EXPLANATION IS GIVEN TO PROVIDE FURTHER LEARNING MATERIAL; AFTER THE SAMPLE EXAMS IN THE PRODUCTS ARE TAKEN BY THE CUSTOMER, THE CUSTOMER'S ANSWERS ARE GRADED TO TRACK THEIR PROGRESS; THE SOFTWARE MAY BE DOWNLOADED FROM A GLOBAL COMPUTER NETWORK