Product IDs, serial numbers and other reference numbers require a unique identifier to avoid confusion when referencing a product or specific data point. Although you can manually enter unique numbers ...

Lists of phone numbers are very common with Microsoft Excel editors. In the case of landline and foreign phone numbers, adding the country code is important, or the caller will never be able to dial ...

Excel considers dates and times as numbers in cells, making calculation difficult. Excel processes 6 AM as "0.25," because it is one quarter of the way through the day. If you need to add a number of ...