Reader Susan Swartz has tired of reading the same messages over and over. She writes: What’s the current best way to find duplicate mail messages? Great question. Let me rephrase it so that the answer ...

You can remove duplicates in Excel in a few steps. Duplicates can create problems when you're dealing with data.

You can stay organized in Gmail with more tools than just email management, such as the tasks list and a versatile contact manager. Over time, especially if you've ever imported contacts, you may find ...

Duplicate contacts are a common annoyance. Here's how to delete them on your iPhone using the Contacts app, iCloud, or a Mac ...

When you're working with a spreadsheet, duplicate data can sometimes make its way in and cause all sorts of problems. In this how-to, we demonstrate two methods of using Microsoft Excel for ...