Exterior The Hilton Crystal City Hotel at Ronald Reagan Washington National Airport is located within walking distance to the metro, shopping, restaurants, and businesses, and within minutes of downtown Washington D.C.
A bookcase, or bookshelf, is a piece of furniture, almost always with horizontal shelves, used to store books. Bookcases are used in private homes, public and university libraries, offices and bookstores.
Excel Workbook vs. Worksheet. In Microsoft Excel, a workbook is simply an Excel file that stores entered related data. Workbooks are capable of holding an almost infinite number of worksheets, depending on the size and the relevance of the data. It is, essentially, a book filled with the data from multiple worksheets.