A PDF — which stands for Portable Document Format — is an open standard document file extension created by Adobe. It has gained popularity in recent years because of the ease of use it affords ...

Word documents have a .docx file extension representing the word processing program. While the program can hold various images within the file, you cannot directly save a Word file as a .jpeg file ...

What does files vs. folders actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

A bug in Lion means Apple's popular TextEdit utility may append the TXT extension to files regardless of their original file types.

On computers and mobile devices, file extensions are the suffixes that apps append to filenames. When you see an item like "document.docx" for example, the .docx extension tells the computer and ...

Maybe you lost tax documents, experienced a family emergency or just procrastinated. Regardless of the issue, you can still get an extension to file until Oct. 15.