These retro typewriters have been converted into USB keyboards. They can be used as keyboards for USB-capable computer, such as a PC, Mac, or even iPad! By Jack Zylkin. He takes old typewriters from the dark ages of office equipment and convert them into keyboards you can use with modern computers. Here’s a video of one of the modded keyboards in action (with an iPad as its screen). You can purchase your own USB Typewriter for about $400 to $500, and he also see kits for $75 to $150.