> In our software collections, we have brought back thousands of hypercard stacks[1] that used to be easily available for Macintosh computers in the 1980s and 1990s – they will boot in your browser and let you enjoy them near-instantly.
The collection is certainly something that couldn't exist in it's current form without the Internet Archive. Sure, there are collections of .sit files sitting in old FTP mirrors, but it's the Internet Archive's in-browser emulation that makes them accessible. (It's unlikely that someone is willing to download an emulator and configure ROMs / system disks, just to play with a stack for 15 seconds).
Now for my usual shout-out: if you have some old stacks sitting around that you want to add to the collection, there's an online uploader[2]. I'm always pleased to see more stacks!
[1] https://archive.org/details/hypercardstacks?sort=-publicdate