President Trump called his escalator mishap at the United Nations "sabotage." The U.N. says the White House team triggered a safety mechanism. We asked two people who work on escalators to explain.

Learn how to automate your Excel spreadsheets with this step-by-step guide. Create a smarter database and boost productivity ...

Here are the best uses of the Arrow keys in Excel with Scroll Lock mode turned on. Pressing Ctrl+Shift+Up, Down, Left, or Right Arrows selects the current cell and all cells above, below, to the left, ...