Sholes and Glidden typewriter seeking to diversify, Remington further refined the typewriter before finally placing it on the market on July 1, 1874. During its development, the typewriter evolved from a crude curiosity into a practical device, the basic form of which became the industry standard. The machine incorporated elements which became fundamental to typewriter design, including a cylindrical platen and a four-rowed QWERTY keyboard. Several design deficiencies remained, however. The Sholes and Glidden could print only upper-case letters—an issue remedied in its successor, the Remington No. 2—and was a "blind writer", meaning the typist could not see what was being written as it
Typewriter in the Sky and Fantasy: Themes, Works, and Wonders" (2005), Gary Westfahl commented, "Recursive fantasy fiction – that is, a fantasy about writing fantasy – is scarce. Luigi Pirandello's play "Six Characters in Search of an Author" (1921) offered a non-genre model." Westfahl noted that Hubbard's book was "an early genre example, perhaps inspired by Pirandello". Umberto Rossi wrote in "The Twisted Worlds of Philip K. Dick" (2011) that "Typewriter in the Sky" included a game in the form of metafiction within its plot development. "Typewriter in the Sky" is well regarded within the genre of fantasy; author David Wingrove noted in "The