The Classic Typewriter Page is a vast storehouse of information about early versions of a breakthrough writing technology. The site includes a brief illustrated history of typewriters, "typewriter collecting and care", and huge lists of early models complete with pictures.
The most interesting aspect of the site, from my perspective, is the glimpses it affords into the development of the technology. A variety of unusual arrangements can be seen, helping us to imagine what might have been had qwerty not become the standard.
[Image from The Classic Typewriter Page]