Nostalgic for your Oregon Trail days?

No more. The Internet Archive, a nonprofit digital archive, has added over 2,300 MS-DOS games and programs to its site.

Everything from Oregon Trail to Sim City to Where in the World is Carmen Sandiego? is now available to play in most browsers (but works best in Firefox and Chrome). And it's all free.

For those too young to remember, MS-DOS (short for Microsoft Disk Operating System) was the popular operating system in the '80s and '90s, before Microsoft (MSFT) Windows took over.

But don't expect things to be exactly as they were in the good old days.

"Of course you can't really save things off for later, and that will limit things," wrote archivist Jason Scott in a blog post. "But on the whole, you will experience some analogue of the MS-DOS program, in your browser, instantly."

Scott, who is a software curator for the Internet Archive, encourages feedback from users on bugs or glitches.

"There's a feedback button -- use it. The goal is that you will be able to do everything you can do with the old interface with the new," wrote Scott.

The Internet Archive is also behind the Wayback Machine, a digital archive of billions of web pages.