What is the importance using dtr system?

Formula that will calculate sum in excel? Relationship between CAD and CAM? What does process information mean? Since I am the executor for a house that my aunt's husband is living in until he dies do I have the right to have a key to the home? What is a smaller unit than a plank? What the difference between SEO analyst and Web analyst? What is a computer used for in a museum? Can you define the computer term app? How many ways are there to create a table in MS Word? How many extra clocks can you display on the taskbar? Why need to assign a manual IP address? Which commands can you use to display the pathname of a current working directory? Can you delete your Microsoft account from Cortana? What is difference pressing enter and pressing shift enter key in word? What is the disadvantage of having open offices? Is there any way I can unlock my metro pcs phone start-up lock code I have already tried all 4 123 etc... and even tried the last four of my phone number. Please help? What is the protocol for a patient who has had a mastectomy? What is the process management in windows 7? How many apps were there on Android Market throughout 2010? How many bits in 24 address bus?