Archive.org is known for archiving a great number of things, broadly classified in terms of the web, written and printed text, studio audio and live music, and video. The most recent addition comes in various realms of software, as outlined by Jason Scott (MeFi's own jscott). But the newest addition is notable because it brings old software back through online emulation - behold, the Historical Software collection, from productivity software like VisiCalc (1979), WordStar (1981 Osborne 1 version), and The Print Shop (1984, NYT review) to vintage games including Eastern Front 1941 (1981), The Hobbit (1982), and Karateka (1984). If you're interested in the way this all works, you can read more on the Archive.org blog.
A few months ago there was a list of links to classic video game emulators posted. Very recently, I'm pleased to report, those links all came true. The Internet Archive bespoke upon aforementioned consoles, computers, and mileposts on our way to the tech utopia of today, (seriously, where's my flying car?) and they asked us to do something: Imagine every computer that ever existed, literally, in your browser. And it was so. I have absolutely no affiliation with jscott, btw. Thought I should disclose that.