When you open a RAR file on your Mac, it will turn into a folder where you can access all of the decompressed files. Visit Business Insider's homepage for more stories.

CSV files are special text files that are quite common when dealing with spreadsheets. Here's how to open and make them.

Will you be able to open today’s Word docs in 20 years? Probably not, unless you take some necessary steps to give those digital files an extra-long shelf life.