[ Ok, so this post is way off topic. Fortunately, it's my blog. ]
I grew up with an Underwood manual typewriter. If I only still had that typewriter I could hook it up to any USB-capable computer. USBTypewriter.com provides design documents, assembly instructions, kits to do it yourself, and you can ship them your typewriter and they'll install the mod for you. Wow!
Hat tip to NspireD2.