How to combine PDF files

From Adobe Acrobat to free online editors and built-in tools, here’s how to merge multiple PDFs into one document.

Why Your Excel Tables Are Failing You and How to Fix Them

Learn the secrets of Excel structured tables to save time, eliminate errors, and create smarter, more dynamic spreadsheets.
CNET on MSN

Finally, a Quick Way to Get Rid of Annoying Duplicate iPhone Photos

This step-by-step guide shows you how to use your iPhone's built-in tool to find and merge all duplicate photos and videos.
How-To Geek on MSN

How to Use the VSTACK and HSTACK Functions in Microsoft Excel

VSTACK and HSTACK are dynamic array functions, meaning the result spills from the cell in which you type the formula, and any changes to the data in the source arrays are reflected in the stacked ...