Briefly describe a sensible equipment maintenance checklist appropriate for a travel booking agency with about four computers that are used to go online and make flight and hotel reservations and use dedicated calendar, appointment, and customer database software. Include in your description at least three discrete programs, systems, procedures, or operations that would go on this checklist. For at least one of the items on the list, describe in detail how you would actually use that procedure in practice, including how often the procedure should be performed.