Zipping and unzipping archive files

- [Instructor] Have you ever downloaded a file…from the internet, or have somebody give you a file…that looks like this, a file that ends…in the three-letter extension, .zip?…Zip files are fairly common.…They're usually used to send batches of files…over the internet, maybe through an email,…or as a downloadable file.…So think about this as a real-world scenario.…You want to ship a bunch of books to somebody…through the mail.…You could put each book individually into an envelope,…carry each one of those envelopes to the post office,…and mail each one of those envelopes individually,…but you probably wouldn't do that.…

If all of those books are going to the same person,…wouldn't it make much more sense to put all of those books…into one box and then ship that box?…The box in this analogy works exactly as the same…as a zip file, with one big exception…which we're going to talk about in a minute.…So a zip file is a file that just contains other files.…So if you're going to send a bunch of files to somebody,…you probably want to send them as a zip file.…