What does bd mdu mean on a script?

Write a program that would find the count of occurrence of largest digit in the input number? Where are periodic signals used? What is a drawback to use of oil shale to produce energy? What are good words to describe steel? Give two possible reasons why their circuit does not work when they close the switch? How do you make glitter graphics in HTML? Can a sewer pipe have too much fall? Which consideration is least important to initial planning for highway erosion control? Why insulated copper wire is used in making solenoid? What is the purpose of hydraulic control system? What are the 2 types of data allowed in QBASIC? How do you reset timer in visual basic 6? Who should you report to in the event of problems that you can not resolve? How do you write a c program to find out whether the given input string is an identifier or not? What is the formula for weight of water in a pipe? What do they call upstairs and downstairs on plans? What is the minimum and maximum spacing for placing reinforcement bar? What are the three methods of filing metal? How do I explain the process of advertising? How are the distinctive characteristics of a service operation illustrated by Hotel Monaco?