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In page Steampunk:

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William Gibson and Bruce Sterling's novel The Difference Engine (1990) is often credited with bringing about widespread awareness of steampunk.[2][3] The novel applies the principles of Gibson and Sterling's cyberpunk writings to an alternative Victorian era where Ada Lovelace and Charles Babbage's proposed steam-powered mechanical computer, which Babbage called a difference engine (a later, more general-purpose version was known as an Analytical Engine), was actually built, and led to the dawn of the Information Age more than a century "ahead of schedule". This setting was different from most steampunk settings in that it takes a dim and dark view of this future, rather than the more prevalent utopian versions.[citation needed]