This post may contain affiliate links; please read our advertiser disclosure for more information.Nowadays most kids don’t know about CDs and DVDs. But if you think that’s an archaic storage device, you’ll be surprised to learn that many airlines are still using floppy disks.Tom Persky, founder of floppydisk.com, revealed in an article on Business Insider that airlines are some of its biggest customers. Persky, who regularly repairs, recycles, and sells floppy disks to anyone who needs this the old technology, is contributing to a new book, “Floppy Disk Fever: The Curious Afterlives of a Flexible Medium,” by Niek Hilkmann and Thomas Walskaar.“My biggest customers — and the place where most of the money comes from — are the industrial users,” Persky said. “Take the airline industry for example. Probably half of the air fleet in the world today is more than 20 years old and still uses floppy disks in the avionics. That’s a huge consumer.”In 2020, as the pandemic hit the whole world, British Airways retired one of its Boeing 747-400s. Security researchers at Pen Test Partner were able to do a quick walkthrough of the plane’s avionics and the flight deck and found a 3.5-inch floppy disk drive in the cockpit that is used to load critical navigation databases.So even though floppy disks are considered an ancient technology where you can’t even store a picture taken with your cell phone, they are still used in many industries. And, as 20-year-old planes continue to fly, floppy disks will be aboard as well.Disclosure: Miles to Memories has partnered with CardRatings for our coverage of credit card products. Miles to Memories and CardRatings may receive a commission from card issuers. Opinions, reviews, analyses & recommendations are the author’s alone, and have not been reviewed, endorsed or approved by any of these entities.Featured: Capital One Venture – Increased 75K Welcome Offer! Capital One Venture has an increased offer right now. For a limited time you can earn 75,000 Miles after $4K spend in the first 3 months of having the card. Venture earns 2X Miles on all purchases plus 5X with Capital One travel. Points can be used for a variety of things including cash back and transferring to travel partners.